.Thursday, April 9, 2009 ' 7:20 PM Y

Here's an example of a periodic table :
The first 20 elements are:
1.hydrogen
2.helium
3.lithium
4.berylium
5.boron
6.carbon
7.nitrogen
8.oxygen
9.flourine
10.neon
11.sodium
12.magnesium
13.aluminium
14.sillicon
15.phosphorus
16.sulphur
17.chlorine
18.argon
19.potassium
20.calcium