Question

Find the Valence electrons for elements with atomic number 1 to 20

Answer 1

Explanation:

elements - valence electron

H - 1

He - 2

Li - 1

Be - 2

B- 3

C - 4

N -5

O- 6

F - 7

Ne -8

Na - 1

Mg - 2

Al-3

Si -4

P -5

S-6

Cl-7

Ar-8

K -1

Ca-2

Note:

the no.of valence electrons only is given here.

Dont consider it as valency of the element.