Question

What is the valency of an atom ,if there are 9 or 13 shells in the valance shell.
please explain the reason too and if you can give an example ,please give it as well .​

Answer 1

Answer:

Element Symbol Atomic Number Valency

Hydrogen H 1 1

Helium He 2 0

Lithium Li 3 1

Beryllium Be 4 2

Boron B 5 3

Carbon C 6 4

Nitrogen N 7 3

Oxygen O 8 2

Fluorine F 9 1

Neon Ne 10 0

Sodium Na 11 1

Magnesium Mg 12 2

Aluminum Al 13 3

Silicon Si 14 4

Phosphorus P 15 3

Sulphur S 16 2

Chlorine Cl 17 1

Argon Ar 18 0

Potassium K 19 1

Calcium Ca 20 2

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