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Interesting Facts

- Rubidium is so reactive that catches fire on exposure to air.

- Francium is a radio active element and is artificially produced by scientists.

-Fluorine is added to toothpaste in the form of fluoride ions.

-Iodine was first prepared from sea weeds.

-The most abundant element in the earth's crust is Oxygen followed by silicon and germanium.

-Rhodium is the rarest metal.

-Helium has the lowest boiling point in metals.

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View Our Cool New Flash Periodic Table !

Periodic Table of Elements :

Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
IA IIA IIIB IVB VB VIB VIIB VIII IB IIB IIIA IVA VA VIA VIIA
0
Period
1 1
H
                 Click on an element to view information
2
He
2 3
Li
4
Be
5
B
6
C
7
N
8
O
9
F
10
Ne
3 11
Na
12
Mg
13
Al
14
Si
15
P
16
S
17
Cl
18
Ar
4 19
K
20
Ca
21
Sc
22
Ti
23
V
24
Cr
25
Mn
26
Fe
27
Co
28
Ni
29
Cu
30
Zn
31
Ga
32
Ge
33
As
34
Se
35
Br
36
Kr
5 37
Rb
38
Sr
39
Y
40
Zr
41
Nb
42
Mo
43
Tc
44
Ru
45
Rh
46
Pd
47
Ag
48
Cd
49
In
50
Sn
51
Sb
52
Te
53
I
54
Xe
6 55
Cs
56
Ba
72
Hf
73
Ta
74
W
75
Re
76
Os
77
Ir
78
Pt
79
Au
80
Hg
81
Tl
82
Pb
83
Bi
84
Po
85
At
86
Rn
7 87
Fr
88
Ra
104
Rf
105
Db
106
Sg
107
Bh
108
Hs
109
Mt
110
Uun
111
Uuu
112
Uub
113
Uut
114
Uuq
115
Uup
116
Uuh
117
Uus
118
Uuo
 
Lanthanoids 57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
71
Lu
Actinoids 89
Ac
90
Th
91
Pa
92
U
93
Np
94
Pu
95
Am
96
Cm
97
Bk
98
Cf
99
Es
100
Fm
101
Md
102
No
103
Lr

Key:      Alkali Metals         Transition Metals         Non-Metals         Halogens
     Alkali Earth Metals         Metals (other)         Rare Earth Metals         Noble Gases

What is The Periodic Table ?

Periodic table is a table in which the chemical elements are arranged in order of their atomic numbers. With this arrangement, elements with similar chemical properties and electronic structures are displayed as vertical columns of the table.

Why are elements with similar properties recurring in Periodic Table ?

The electrons in the outermost shell of an atom control its chemical properties as they determine what type of reaction they undergo. When elements are arranged in the periodic table, the elements having same number of valence electrons (no.of electrons in the outermost shell) come under each other forming a group. Thus elements in the same group have similar chemical properties.

Relevant Terminology :

Periods : The horizontal rows in the periodic table are called periods. Elements in the same period have the same number of shells but the number of electrons increases by 1 for each element.

Groups : The vertical columns in the periodic table are called groups. Elements in a group have the same number of valence electrons but the no. of shells increases by 1 for each element.

Atomic Size(Radii) - The radius of an atom may be taken as the distance between the the nucleus of the atom and the outermost shell.
Atomic size increases down the group and decreases across a period.
Francium has the largest atomic size.

Ionization Potential - It is the amount of energy absorbed when one electron is removed from the outermost shell of an isolated gaseous atom.
IP increases across a period and decreases down the group.
Fluorine has the highest I.P.

Electron Affinity - It is the amount of energy released when one electron is added to the outermost shell of an isolated gaseous atom.
It increases across a period and decreases down the group.
Chlorine has the highest electron affinity.

Electronegativity - The tendency of an atom to attract the shared pair of electrons towards itself when combined in a compound is called electronegativity.
It increases across a period and decreases down the group.
Fluorine has the highest electronegativity.

Metallic and non metallic character - An element is considered as a metal if it loses electrons when supplied with energy. When an element gains electrons it is said to be a non metal.
Metallic character increases down the group.
Non-metallic character increases across a period.
Caesium is the most metallic element.

Important Groups :

Few groups of elements are important from the students point of view. A brief study on selected groups can be found here. Some of the groups have been assigned special names.

Alkali Metals - Elements of the group I A

Alkali Earth Metals
- Elements of the group II A

Halogens
- Elements of the group VII A

Noble Gases
- 0 group elements.
Flash Periodic Table
Check out our cool new Flash Periodic Table.

Coinage Elements : Copper,Silver and Gold make up Group 11 of the periodic table. These are so called because they are used for making coins.

Transition Metals : There are 21 metals in this group, which includes columns 4 to 10, the central block of the periodic table. They fall in three periods of the table: from titanium to nickel, from zirconium to palladium, and from hafnium to platinum.

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Note:Some links in the periodic table link to physlink and some link to webelements.We do not have any responsibility to the external links. Information Courtesy for some pages Physlink ©

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