Dimitri Mendeleev discovered that elements when
arranged by mass seemed to organize themselves in
other ways as well.
How does this periodic table
differ from the one displayed in
our room?
http://www.chem.msu.su/eng/misc/mendeleev/welcome.html
1
IA
1
18
VIIIA
2
IIA
13
IIIA
14
IVA
15
VA
16
VIA
17
VIIA
2
3
3
IIIB
4
IVB
5
VB
6
VIB
7
VIIB
8
9
VIIIB
4
5
6
7
Metals
10
11
IB
12
IIB
Nonmetals

Main (Representative), Transition metals, lanthanides and actinides (rare earth)

Nonmetals, Metals, Metalloids, Noble gases
Periods: Are arranged horizontally across the
periodic table (rows 1-7)

These elements have the same number of valence shells.

1
IA
1
18
VIIIA
2
IIA
13
IIIA
2nd Period
2
3
3
IIIB
4
IVB
5
VB
4
5
6th Period
6
7
6
VIB
7
VIIB
8
9
VIIIB
10
11
IB
12
IIB
14
IVA
15
VA
16
VIA
17
VIIA
Family:
These
Are arranged vertically down the periodic table
(columns or group, 1- 18 or 1-8 A,B)
elements have the same number electrons in the outer most shells, the
valence shell.
1
IA
1
18
VIIIA
Alkali Family:
1 e- in the valence shell
2
IIA
13
IIIA
14
IVA
15
VA
16
VIA
2
3
3
IIIB
4
IVB
5
VB
6
VIB
7
VIIB
8
9
VIIIB
10
11
IB
12
IIB
4
5
6
7
Halogen Family:
7 e- in the valence shell
17
VIIA

Notable families of the Periodic Table and some important members:
Halogen
Noble Gas
Chalcogens
Alkal
i
Alkalin
1
IA
1
2
IIA
e
(earth)
18
VIIIA
13
IIIA
Transition Metals
2
3
4
5
6
7
3
IIIB
4
IVB
5
VB
6
VIB
7
VIIB
8
9
VIIIB
10
11
IB
12
IIB
14
IVA
15
VA
16
VIA
17
VIIA