Question

tell me the name and valency of electron upto 20

Answer 1

1 H Hydrogen 1, 0, -1
2 He Helium 0
3 Li Lithium 1, -1
4 Be Beryllium 2
5 B Boron 3, 2, 1
6 C Carbon 4, 3, 2, 1, -1, -2, -4
7 N Nitrogen 5, 4, 3, 2, 1, 0, -1, -2, -3
8 O Oxygen 2, 1, 0, -1, -2
9 F Fluorine 0, -1
10 Ne Neon 0
11 Na Sodium 1, -1
12 Mg Magnesium 2
13 Al Aluminum 3, 1
14 Si Silicon 4, 3, 2, 1, -1, -2, -4
15 P Phosphorus 5, 4, 3, 2, 1, 0, -1, -2, -3
16 S Sulfur 6, 5, 4, 3, 2, 1, 0, -1, -2
17 Cl Chlorine 6, 5, 4, 3, 2, 1, 0, -1, -2
18 Ar Argon 0
19 K Potassium 1, -1
20 Ca Calcium 2
Mark me as brainlist