Periodic Trends

Note Guide
How is the periodic table arranged?
 The

modern periodic table is
arranged by increasing atomic
number (protons).
Classes of elements
Metals


80% of the table!



Solids at room temperature (except for Mercury)

Nonmetals


Most are...
Periods and Groups


The vertical columns are called groups



The horizontal rows are called periods
The Representative Elements
 Groups
 For

1A – 7A

these elements
the group number
represents the
number of electrons
in...
Periodic Trends
 Atomic

size
(Distance between
nuclei)
 Increases

from top
to bottom (energy
levels increase)

 Decre...
Periodic Trends


Ionization energy (energy required to remove one
electron)


Decrease from top to bottom



Increases...
Periodic Trends


_Ionic Size (size of a
charged atom)


Cations (+) are always
smaller than the atom
from which they fo...
Periodic Trends


Electronegativity (ability of an atom to attract electrons when in a
compound)


Decreases from top to...
Vocabulary Cards
 Periodic

Table

 Metal
 Nonmetal
 Metalloid
 Energy

Level

 Ionization

Energy

 Cation
 Anion...
POST IT UP

How is electronegativity related to how
an element will react in a chemical
compound?
I S!
TH
OT
IG

IN
EE
DH
...
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Periodic trends

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  • electro negativity is the power to attract the e- towards itself it will determine how a molecule reacts in nucleophilic reaction and all ,,,,,,,,, leaving gp......... it will determine how easily a bond can be broken to fecilitate formation of new bond
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Periodic trends

  1. 1. Periodic Trends Note Guide
  2. 2. How is the periodic table arranged?  The modern periodic table is arranged by increasing atomic number (protons).
  3. 3. Classes of elements Metals  80% of the table!  Solids at room temperature (except for Mercury) Nonmetals  Most are gases (except for Sulfur, Phosphorus, Bromine) Metalloids  Similar properties to both metals and nonmetals depending on the conditions
  4. 4. Periods and Groups  The vertical columns are called groups  The horizontal rows are called periods
  5. 5. The Representative Elements  Groups  For 1A – 7A these elements the group number represents the number of electrons in the highest occupied energy level
  6. 6. Periodic Trends  Atomic size (Distance between nuclei)  Increases from top to bottom (energy levels increase)  Decreases from left to right (electrons get pulled closer to the nucleus)
  7. 7. Periodic Trends  Ionization energy (energy required to remove one electron)  Decrease from top to bottom  Increases from left to right (more attraction to nucleus makes it harder to get that electron out!)
  8. 8. Periodic Trends  _Ionic Size (size of a charged atom)  Cations (+) are always smaller than the atom from which they form  Anions (-) are always larger than the atoms from which they form  Increases from top to bottom  Decreases from left to right
  9. 9. Periodic Trends  Electronegativity (ability of an atom to attract electrons when in a compound)  Decreases from top to bottom  Increases from left to right
  10. 10. Vocabulary Cards  Periodic Table  Metal  Nonmetal  Metalloid  Energy Level  Ionization Energy  Cation  Anion  Electronegativity  Valence Electrons
  11. 11. POST IT UP How is electronegativity related to how an element will react in a chemical compound? I S! TH OT IG IN EE DH EL P!

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