The document discusses the history and development of the periodic table. It describes Dobereiner's triads and Newlands' law of octaves as early attempts to classify elements. Mendeleev created the first periodic table by arranging elements by atomic mass and predicted properties of undiscovered elements. The modern periodic table is arranged by atomic number, completing the 7th period with the discoveries of elements 113, 115, 117, and 118. Elements are classified into blocks based on their electronic configuration. The periodic table shows periodic trends in properties and groups elements with the same number of valence electrons.
Periodic classification of elements 10 CHM(5)VeenuGupta8
THIS PRESENTATION IS BASED ON THE PERIODIC CLASSIFICATION OF ELEMENTS AND THE VARIATION OF THE PERIODIC PROPERTIES IN THE PERIODIC TABLE.IT IS EASY TO GET KNOWLEDGE ABOUT THE PERIODIC PROPERTIES.
Historical development of periodic tableVeenuGupta8
THIS PRESENTATION IS BASED ON THE CONTRIBUTION OF DIFFERENT CHEMIST IN CREATING THE PERIODIC TABLE .IT WILL HELP THE LEARN THE VARIOUS MERITS AND DEMERITS OF VARIOUS METHODS OF CLASSIFYING ELEMENTS
The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The structure of the table shows periodic trends.
Periodic classification of elements 10 CHM(5)VeenuGupta8
THIS PRESENTATION IS BASED ON THE PERIODIC CLASSIFICATION OF ELEMENTS AND THE VARIATION OF THE PERIODIC PROPERTIES IN THE PERIODIC TABLE.IT IS EASY TO GET KNOWLEDGE ABOUT THE PERIODIC PROPERTIES.
Historical development of periodic tableVeenuGupta8
THIS PRESENTATION IS BASED ON THE CONTRIBUTION OF DIFFERENT CHEMIST IN CREATING THE PERIODIC TABLE .IT WILL HELP THE LEARN THE VARIOUS MERITS AND DEMERITS OF VARIOUS METHODS OF CLASSIFYING ELEMENTS
The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The structure of the table shows periodic trends.
classification of elements and periodicity in properties class 11
classification of elements and periodicity in properties class 11 pdf classification of elements and periodicity in properties exercise classification of elements and periodicity in properties ncert classification of elements and periodicity in properties class 11 ppt classification of elements and periodicity in properties mind map what is periodic classification of elements classification of elements and periodicity in properties question answer classification of elements and periodicity in properties questions classification of elements and periodicity in properties in hindi chapter 3 classification of elements and periodicity in properties notes what is meant by periodic classification of elements classification of elements and periodicity in properties formulas classification of elements and periodicity in properties mcq pdf
Periodic Classification Of Elements Class 10thNehaRohtagi1
PowerPoint Presentation on the topic - 'Periodic Classification Of Elements'.
For Class:- 10th
Created By - 'Neha Rohtagi'.
I hope that you will found this presentation useful and it will help you out for your concept understanding.
Thank You!
Please give feedbacks and suggestions to get presentations on more interesting topics.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
More Related Content
Similar to std10-ch1-elements-periodictable-160311163815.pdf
classification of elements and periodicity in properties class 11
classification of elements and periodicity in properties class 11 pdf classification of elements and periodicity in properties exercise classification of elements and periodicity in properties ncert classification of elements and periodicity in properties class 11 ppt classification of elements and periodicity in properties mind map what is periodic classification of elements classification of elements and periodicity in properties question answer classification of elements and periodicity in properties questions classification of elements and periodicity in properties in hindi chapter 3 classification of elements and periodicity in properties notes what is meant by periodic classification of elements classification of elements and periodicity in properties formulas classification of elements and periodicity in properties mcq pdf
Periodic Classification Of Elements Class 10thNehaRohtagi1
PowerPoint Presentation on the topic - 'Periodic Classification Of Elements'.
For Class:- 10th
Created By - 'Neha Rohtagi'.
I hope that you will found this presentation useful and it will help you out for your concept understanding.
Thank You!
Please give feedbacks and suggestions to get presentations on more interesting topics.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
1. Standard 10 Chapter Periodic Table
Standard 10 Chapter Periodic Table
Gurudatta K Wagh
Gurudatta K Wagh
2. Dobereiner's Triads
Triads Groups of three elements which showed
similar properties
Atomic mass of the middle element is
approximately the mean of the atomic masses
of other two elements
Dobereiner's Triads
Triads Groups of three elements which showed
similar properties
Atomic mass of the middle element is
approximately the mean of the atomic masses
of other two elements
Element Atomic mass
Li 6.9
Na 23
K 39
Standard 10 Chapter Periodic Table
Standard 10 Chapter Periodic Table
In the triad of Li, Na and K the
atomic mass of Na (23) is the
mean of the atomic masses of
Li and K
6.9 + 39 = 45.9 ÷ 2 = 22.95
In the triad of Li, Na and K the
atomic mass of Na (23) is the
mean of the atomic masses of
Li and K
6.9 + 39 = 45.9 ÷ 2 = 22.95
Johann
Wolfgang
Dobereiner
Johann
Wolfgang
Dobereiner
3. Element Atomic mass
Li 6.9
Na 23
K 39
Ca 40.1
Sr 87.6
Ba 137.3
Cl 35.5
Br 79.9
I 126.9
S 32
Se 79
Te 128
Features
Only a few triads could be
identified
System of triads could not
continue
Features
Only a few triads could be
identified
System of triads could not
continue
4. Newland’s Octaves
Fifty-six elements were discovered
Newlands arranged them in the increasing order of
their atomic masses
Every eighth element had properties similar to the
first
Compared them with the octaves in music
Newland’s Octaves
Fifty-six elements were discovered
Newlands arranged them in the increasing order of
their atomic masses
Every eighth element had properties similar to the
first
Compared them with the octaves in music
John Alexander
Reina Newlands
John Alexander
Reina Newlands
Seven musical
notes
Indian
sa, re, ga, ma, pa,
da, ni
Western
do, re, mi, fa, so,
la, ti
Seven musical
notes
Indian
sa, re, ga, ma, pa,
da, ni
Western
do, re, mi, fa, so,
la, ti
5. Features
Out of the 56 elements, elements up to Ca could
be arranged
After Ca every eighth element did not possess
properties similar to the first
To fit the existing elements two elements were
placed in the same position which differed in their
properties
Inert (noble) gases were not included because
they were not discovered
Features
Out of the 56 elements, elements up to Ca could
be arranged
After Ca every eighth element did not possess
properties similar to the first
To fit the existing elements two elements were
placed in the same position which differed in their
properties
Inert (noble) gases were not included because
they were not discovered
6. Dmitri Ivanovich
Mendeleev
Dmitri Ivanovich
Mendeleev
Mendeleev’s Periodic Table
Examined the relationship between
the atomic masses of elements and
their physical and chemical
properties
Mendeleev’s Periodic Table
Examined the relationship between
the atomic masses of elements and
their physical and chemical
properties
Chemical properties Concentrated on the
compounds formed by the elements with oxygen
and hydrogen as they were very reactive
Believed that atomic mass was the most
fundamental property in classifying the elements
Chemical properties Concentrated on the
compounds formed by the elements with oxygen
and hydrogen as they were very reactive
Believed that atomic mass was the most
fundamental property in classifying the elements
7. Arranged elements in the increasing order of their
atomic masses in horizontal rows till he came
actoss an element which had properties similar to
the first
He placed this element below the first element and
thus started the second row of elements
Created the first periodic table containing 63
elements known
Arranged elements in the increasing order of their
atomic masses in horizontal rows till he came
actoss an element which had properties similar to
the first
He placed this element below the first element and
thus started the second row of elements
Created the first periodic table containing 63
elements known
8. Mendeleev’s Periodic Table
The tabular arrangement of the elements based on
the periodic law
Mendeleev’s Periodic Table
The tabular arrangement of the elements based on
the periodic law
Mendeleev’s
Periodic Law
The physical and
chemical
properties of
elements are a
periodic function
of their atomic
masses
Mendeleev’s
Periodic Law
The physical and
chemical
properties of
elements are a
periodic function
of their atomic
masses
9. Features
Periods
Horizontal rows, numbered 1 to 7
Properties of elements in a period show regular
gradation from left to right
Groups
Vertical columns, numbered I to VIII. I to VII are
further divided into A and B subgroups
Features
Periods
Horizontal rows, numbered 1 to 7
Properties of elements in a period show regular
gradation from left to right
Groups
Vertical columns, numbered I to VIII. I to VII are
further divided into A and B subgroups
10. Demerits
H resembles alkali metals and halogens. No fixed
position could be given to H
Isotopes of same elements have different atomic
masses. Each of them should be given a different
position. As isotopes are chemically similar, they
were given same position
Co with higher atomic mass (58.93) is placed
before Ni (58.71)
Mn is placed with halogens which totally differ in
the properties
Demerits
H resembles alkali metals and halogens. No fixed
position could be given to H
Isotopes of same elements have different atomic
masses. Each of them should be given a different
position. As isotopes are chemically similar, they
were given same position
Co with higher atomic mass (58.93) is placed
before Ni (58.71)
Mn is placed with halogens which totally differ in
the properties
11. Merits
Successful classification of all known elements
Some vacant/ blank spaces were left for elements
yet to be discovered
Mendeleev predicted properties of these elements
even before they were discovered
Later they were found to be correct
Noble gases were discovered later and placed in
the table without disturbing the positions of other
elements
Merits
Successful classification of all known elements
Some vacant/ blank spaces were left for elements
yet to be discovered
Mendeleev predicted properties of these elements
even before they were discovered
Later they were found to be correct
Noble gases were discovered later and placed in
the table without disturbing the positions of other
elements
12. Modern Periodic Table
Atomic number is the most fundamental
property of an element and not its
atomic mass – Henry Moseley
Modern Periodic Table
Atomic number is the most fundamental
property of an element and not its
atomic mass – Henry Moseley
Henry
Gwyn
Jeffreys
Moseley
Henry
Gwyn
Jeffreys
Moseley
Atomic number (Z) = number of protons in the
nucleus of the atom
Also represents number of electrons in the outer
shell
Atomic number (Z) = number of protons in the
nucleus of the atom
Also represents number of electrons in the outer
shell
13. Mendeleev’s Periodic Law was modified into
Modern Periodic Law
The chemical and physical properties of elements
are a periodic function of their atomic numbers
Modern Periodic Table = Long Form of Modern
Periodic Table
Not much different from Mendeleev’s Periodic
Table
Mendeleev’s Periodic Law was modified into
Modern Periodic Law
The chemical and physical properties of elements
are a periodic function of their atomic numbers
Modern Periodic Table = Long Form of Modern
Periodic Table
Not much different from Mendeleev’s Periodic
Table
14. Discovery and Assignment of Elements with Atomic Numbers 113, 115, 117
and 118
IUPAC announces the verification of the discoveries of four new chemical
elements: The 7th period of the periodic table of elements is complete.
Update 21 Jan 2016: Technical Reports available
The fourth IUPAC/IUPAP Joint Working Party (JWP) on the priority of claims to the
discovery of new elements has reviewed the relevant literature for elements 113,
115, 117, and 118 and has determined that the claims for discovery of these
elements have been fulfilled, in accordance with the criteria for the discovery of
elements of the IUPAP/IUPAC Transfermium Working Group (TWG) 1991 discovery
criteria. These elements complete the 7th row of the periodic table of the
elements, and the discoverers from Japan, Russia and the USA will now be invited
to suggest permanent names and symbols. The new elements and assigned
priorities of discovery are as follows:
Element 113 (temporary working name and symbol: ununtrium, Uut)
Elements 115, 117, and 118 (temporary working names and symbols:
ununpentium, Uup; ununseptium, Uus; and ununoctium, Uuo)
http://www.iupac.org/news/news-detail/article/discovery-and-assignment-of-elements-with-atomic-numbers-113-115-117-and-118.html
15.
16.
17. Position of elements in the Modern Periodic Table
Periods (number of shells)
Horizontal rows, Seven, numbered 1-7
Elements in the same period have same number of
shells which is equal to the period number. E.g.
Period 7 has 7 Shells
In each period a new shell starts filling up
Position of elements in the Modern Periodic Table
Periods (number of shells)
Horizontal rows, Seven, numbered 1-7
Elements in the same period have same number of
shells which is equal to the period number. E.g.
Period 7 has 7 Shells
In each period a new shell starts filling up
18. Period
no.
Size Elements
1 shortest 2
2 short 8
3 short 8
4 long 18
5 long 18
6 longest 32
7 incomplete see box
*IUPAC announces the verification of the discoveries of four new chemical
elements: The 7th period of the periodic table of elements is complete.
Update 21 Jan 2016: Technical Reports available
http://www.iupac.org/news/news-detail/article/discovery-and-assignment-of-elements-with-atomic-numbers-113-115-117-and-118.html
*Temporary
working names
and symbols
113 ununtrium,
Uut
115 ununpentium,
Uup
117 ununseptium,
Uus
118 ununoctium,
Uuo
19. Groups (number of valence electrons)
Vertical columns, Eighteen, numbered 1-18
Elements in the same group have
•same number of valence electrons/ same outer
electronic configuration,
•show same chemical properties
Group 1, alkali metals
Group 2, alkaline earth metals
Group 17, halogens
Group 18, inert/ noble gases
Groups (number of valence electrons)
Vertical columns, Eighteen, numbered 1-18
Elements in the same group have
•same number of valence electrons/ same outer
electronic configuration,
•show same chemical properties
Group 1, alkali metals
Group 2, alkaline earth metals
Group 17, halogens
Group 18, inert/ noble gases
20. Metals – left hand side
Non-metals – right hand side
Normal elements – Groups 1, 2 and Groups 13-17.
One outermost shell incomplete
Transition elements – Groups 3-12. Two outermost
shells incomplete
Inert gases – Outermost shell contains 8 electrons
Metals – left hand side
Non-metals – right hand side
Normal elements – Groups 1, 2 and Groups 13-17.
One outermost shell incomplete
Transition elements – Groups 3-12. Two outermost
shells incomplete
Inert gases – Outermost shell contains 8 electrons
21. Group no. 1 2 3-4-5-6-7-8-9-10-
11-12
13-14-15-
16
17 18
Type Alkali
metals
Alkaline
earth
metals
Transition
elements
Non-
metals,
metalloids,
metals
Halogens Inert or
noble
gases
Normal elements Normal elements
22. Inner transition – at the bottom, contain two
series, viz. lanthanides, actinides
Lanthanides (Ce – Lu) – 14 elements, atomic
numbers 58-71. Placed along with La (57), Group 3,
Period 6. Close resemblance in properties to La
Actinides (Th – Lr) – 14 elements, atomic numbers
90-103. Placed along with Ac (89), Group 3, Period
7. Close resemblance in properties to Ac
Inner transition – at the bottom, contain two
series, viz. lanthanides, actinides
Lanthanides (Ce – Lu) – 14 elements, atomic
numbers 58-71. Placed along with La (57), Group 3,
Period 6. Close resemblance in properties to La
Actinides (Th – Lr) – 14 elements, atomic numbers
90-103. Placed along with Ac (89), Group 3, Period
7. Close resemblance in properties to Ac
Group 3
Period 6 Lanthanides 14 elements
Period 7 Actinides 14 elements
23. Classification of elements as per electronic configuration
Four blocks s, p, d, f
s-block Metals, Groups 1, 2. 1 or 2 electrons in outermost
shell, normal elements
p-block Metals, non-metals, metalloids, Groups 13-18. 3-8
electrons in outermost shell, normal elements except
Group 18
d-block Transition elements/ metals, Groups 3-12. Two
outermost shells incomplete
f-block Inner transition elements/ metals, at the bottom,
lanthanides, actinides
Classification of elements as per electronic configuration
Four blocks s, p, d, f
s-block Metals, Groups 1, 2. 1 or 2 electrons in outermost
shell, normal elements
p-block Metals, non-metals, metalloids, Groups 13-18. 3-8
electrons in outermost shell, normal elements except
Group 18
d-block Transition elements/ metals, Groups 3-12. Two
outermost shells incomplete
f-block Inner transition elements/ metals, at the bottom,
lanthanides, actinides
24.
25. Group/s 1-2 3-12 13-18 3
Block s
Metals
d
Transition
elements/
metals
p
Metals,
Non-
metals,
metalloids
f
Inner transition
elements/ metals
Lanthanides
(Period 6)
Actinides
(Period 7)
Electrons in
outermost
shell
1, 2 2 outermost
shells
incomplete
3-8 2 outermost
shells incomplete
26. Merits
Modern Periodic Table (atomic number) versus
Mendeleev’s Periodic Table (atomic mass)
All isotopes of the same elements have different
masses but same atomic number and occupy the
same position
Anomaly regarding Co (27) and Ni (28) disappears
Classification of elements into blocks based on their
electronic configuration
Merits
Modern Periodic Table (atomic number) versus
Mendeleev’s Periodic Table (atomic mass)
All isotopes of the same elements have different
masses but same atomic number and occupy the
same position
Anomaly regarding Co (27) and Ni (28) disappears
Classification of elements into blocks based on their
electronic configuration
27. Periodic properties
Properties show gradual variation in a group and in
a period
Properties repeat after a certain interval of atomic
number
Valency
Number of valence electrons in the outermost shell
In a group all the elements have the same valency
Increases from 1 to 4 for the periods 2, 3 and
decreases from 4 to 0 left to right
Periodic properties
Properties show gradual variation in a group and in
a period
Properties repeat after a certain interval of atomic
number
Valency
Number of valence electrons in the outermost shell
In a group all the elements have the same valency
Increases from 1 to 4 for the periods 2, 3 and
decreases from 4 to 0 left to right
28. Atomic size
Determined using atomic radius
Atomic radius is the distance between the centre of
atom and the outermost shell
Atomic radius decreases from left to right in a
period because electrons are added to same shell
and experience greater pull from the nucleus
Atomic radius increases from top to bottom in a
group because new shells are added, thereby
pushing outermost electrons farther from the
nucleus
Atomic size
Determined using atomic radius
Atomic radius is the distance between the centre of
atom and the outermost shell
Atomic radius decreases from left to right in a
period because electrons are added to same shell
and experience greater pull from the nucleus
Atomic radius increases from top to bottom in a
group because new shells are added, thereby
pushing outermost electrons farther from the
nucleus
29. Atomic
radius
Atomic
radius
P
e
r
i
o
d
Atomic radius
decreases from left
to right
Ooo
electrons are added to the same shell and
experience greater pull from the nucleus
Group O
O
O
Atomic radius increases from top to bottom
new shells are added, thereby pushing outermost electrons
farther from the nucleus
30. Metallic and non-metallic properties
Metals – tendency to lose electrons, electropositive
Non-metals – tendency to accept/ share electrons,
electronegative
Because atomic size decreases and electrons are not
easily released
•Metallic character – decreases left to right in a period
•Non-metallic character – increases left to right in a period
In the group, on the right side, lower members are non-
metals and higher members are metals
Metallic and non-metallic properties
Metals – tendency to lose electrons, electropositive
Non-metals – tendency to accept/ share electrons,
electronegative
Because atomic size decreases and electrons are not
easily released
•Metallic character – decreases left to right in a period
•Non-metallic character – increases left to right in a period
In the group, on the right side, lower members are non-
metals and higher members are metals
31. Because atomic size increases and valence
electrons can be easily removed
•In a group, metallic character increases and non-
metallic character decreases from top to bottom
•Group 14 First element is C, non-metal, next two Si
and Ge are metalloids, Sn and Pb are metals
A zig-zag line separates metals from non-metals
Borderline elements B, Si, Ge, As, Te, Po show
intermediate properties – metalloids/ semi-metals
Because atomic size increases and valence
electrons can be easily removed
•In a group, metallic character increases and non-
metallic character decreases from top to bottom
•Group 14 First element is C, non-metal, next two Si
and Ge are metalloids, Sn and Pb are metals
A zig-zag line separates metals from non-metals
Borderline elements B, Si, Ge, As, Te, Po show
intermediate properties – metalloids/ semi-metals
32. THANK YOU
SSC Std 10th
Textbook
CBSE Std 10th
Textbook
YouTube
Google
Wikipedia
Suggestions and Appreciations welcome
gkwagh@gmail.com