Question

Name of metals or non metals in table of 1 to 20 valencies

Answer 1

1 hydrogen
2 helium
3 lithium
4 beryllium
5 boron
6 carbon
7 nitrogen
8 oxygen
9 fluorine
10 neon
11 sodium
12 aluminum
13 magnesium
14 silicon
15 phosphorus
16 sulphur
17 chlorine
18 argon
19 potassium
20 calcium