Answers

2014-12-17T19:26:56+05:30
Hydrogen
Helium
Neon
Lithium
Uranium
Sodium
Pottasium
Barium
Argon
Krypton
Xenon
Radon
Rabdium
Francium
Magnesium
Calcium
Stroncium
Rhodium
Carbon
Sillicon
Germanium
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2014-12-17T19:57:17+05:30
20 POPULAR ELEMENTS ARE:
1-HYDROGEN
2-HELIUMĀ 
3-CARBON
4-NITROGENĀ 
5-OXYGEN
6-CHLORINE
7-LITHIUM
8-BORON
9-NEON
10-SODIUM
11-POTASSIUM
12-CALCIUM
13-ALMUNIUM
14-SULPHUR
15-COPPER
16-ZINC
17-NICKEL
18-COBALT
19-MAGNESSIUM
20-IRON
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