1. Topic 6 – The PeriodicTopic 6 – The Periodic
TableTable
C6 Lesson 2
The modern Periodic Table
2. Aims: To be able to use the Periodic Table
Starter Activity:
Write out the electron arrangements of Sodium
and chlorine
Keywords atomic number groups periods
09/27/13The Periodic Table
3. Rows and ColumnsRows and Columns
• The periodic table is organized like a big grid.
• Elements are placed in specific places
because of the way they look and act.
• If you have ever looked at a grid, you know that
there are rows (left to right) and columns (up and
down).
• The periodic table has rows and columns, too,
and they each mean something different.
4. • Even though they skip
some squares in
between, all of the
rows go left to right.
When you look at a
periodic table, each of
the rows is
considered to be a
different period
PeriodsPeriods
5. Periods – rows of elementsPeriods – rows of elements
Rows of elements are called periodsperiods.
H He
1
Li Be N O F NeB C2
Na Mg Al P S Cl ArSi3
K Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge Se BrCa KrAs4
Rb Y Zr Nb Mo Tc Ru Pd Ag Cd In Sn SbSr TeRh I Xe5
Cs Ba Hf Ta W Re Os Ir Au Hg Tl Pb Bi PoLa AtPt Rn6
Fr Ra Rf Db Sg Bh Hs Mt ? ?Ac ?7
Period Number
6. GroupsGroups
• The periodic table has
a special name for its
columns, too. When a
column goes from top
to bottom, it's called a
group.
7. Groups – columns of elementsGroups – columns of elements
Downward columns are called groups.groups.
H
Li
Na
K
Rb
Cs
Fr
Group1
Be
Mg
Ca
Sr
Ba
Ra
Group2
Ga
In
Tl
Al
B
Group3
Ge
Sn
Pb
Si
C
Group4
Sb
Bi
P
N
As
Group5
Se
Te
Po
O
S
Group6
He
Kr
Ne
Ar
Rn
Xe
Group0
Sc Ti V Cr Mn Fe Co Ni Cu Zn
Y Zr Nb Mo Tc Ru Pd Ag CdRh
Hf Ta W Re Os Ir Au HgLa Pt
Rf Db Sg Bh Hs Mt ? ?Ac ?
Transition Elements
Means in-between
Br
At
Cl
F
I
Group7
8. ActivityActivity
In pairs, go on to the website: http://www.chemicool.com/
Click on the elements of Period 2, go to appearance and
characteristics and write 4 words about the properties of
the element. i.e.: Lithium is corrosive, soft and silvery,
highly reactive, least dense metal.
Now click on the elements of group 7, go to appearance
and characteristics and write 4 words about the
properties of the element.
Use the website to complete the 2 tables on the
worksheet and stick in your book.
11. Say whether these elements are metals, non-
metals or metalloids.
H
Li
Na
K
Rb
Cs
Fr
Be
Sc Ti
Mg
V Cr Mn Fe Co Ni Cu Zn Ga Ge Se BrCa Kr
Y Zr Nb Mo Tc Ru Pd Ag Cd In Sn SbSr TeRh
Ba Hf Ta W Re Os Ir Au Hg Tl Pb Bi PoLa AtPt
Ra Rf Db Sg Bh Hs Mt ? ?Ac ?
Al P
N O
S Cl
F Ne
Ar
Rn
I
Si
Xe
He
B C
As
Silicon (Si) MetalloidFrancium (Fr) MetalScandium (Sc) MetalKrypton (Kr) Non-metalCobalt (Co) Metal
12. Say whether these elements are solids, liquids
or gases.
H
Li
Na
K
Rb
Cs
Fr
Be
Sc Ti
Mg
V Cr Mn Fe Co Ni Cu Zn Ga Ge Se BrCa Kr
Y Zr Nb Mo Tc Ru Pd Ag Cd In Sn SbSr TeRh
Ba Hf Ta W Re Os Ir Au Hg Tl Pb Bi PoLa AtPt
Ra Rf Db Sg Bh Hs Mt ? ?Ac ?
Al P
N O
S Cl
F Ne
Ar
Rn
I
Si
Xe
He
B C
As
Krypton (Kr) Gas
Kr
Niobium (Nb) Solid
Nb
Barium (Ba)
Ba
SolidNitrogen (N)
N
GasBromine (Br)
Br
Liquid
13. H He1
Li
Na
K
Rb
Cs
Fr
Be
Sc Ti
Mg
V Cr Mn Fe Co Ni Cu Zn Ga Ge Se BrCa Kr
Y Zr Nb Mo Tc Ru Pd Ag Cd In Sn SbSr TeRh
Ba Hf Ta W Re Os Ir Au Hg Tl Pb Bi PoLa AtPt
Ra Rf Db Sg Bh Hs Mt ? ?Ac ?
Al P
N O
S Cl
F Ne
Ar
Rn
I
Si
Xe
B C
As
1
2
3
4
5
6
7
0
2
4
3
5
6
7
Gp
Pd
What’s the electron arrangement
Mg
C
2.8.22.42.8.7
Cl
K
2.8.8.1MgCClK
14. SummarySummary
• The modern table is arranged in order of
ATOMIC NUMBER.
• There are eight columns called GROUPS
• There are seven Rows called PERIODS
• Metals are on the Left
• Non-metals are on the Right
15. Groups & PeriodsGroups & Periods
• Elements in the same group have the
same number of electrons in the outer
shell
• Elements in Groups generally form similar
compounds
• Elements in the same period have the
same number of electron shells
• The elements in Periods have very
different properties, which repeat in the
next period.
16. HOMEWORKHOMEWORK
• Find out the electron arrangements of the
Group 0 elements
• Find out some information about each of
these elements e.g. state, colour,
reactivity, uses
• Find out why they are unreactive elements
and explain this in terms of electrons
