Science Periodic Table 

Element are classification on the basic of similarities in their properties .at present,118 elements are known to us, out of which 98 are naturally occurring while remaining are synthesised artificially by man .Main objective of classification of elements is to make the 
study of 118 elements




          




Atomic number

Symbol

Element

Atomic weight

Atomic radius

1

H

Hydrogen

1.008

37.1

2

He

Helium

4.002

31

3

Li

Lithium

6.941

152

4

Be

Beryllium

9.012

112

5

B

Boron

10.811

85

6

C

Carbon

12.011

77.2

7

N

Nitrogen

14.007

74

8

O

Oxygen

15.999

73

9

F

Fluorine

18.998

72

10

Ne

Neon

20.180

71