Question

Twenty electronic configuration

Answer 1

The electronic configurations of the first 20 elements:

H: 1

He: 2

Li: 2, 1

Be: 2, 2

B: 2, 3

C: 2, 4

N: 2, 5

O: 2, 6

F: 2, 7

Ne: 2, 8

Na: 2, 8, 1

Mg: 2, 8, 2

Al: 2, 8, 3

Si: 2, 8, 4

P: 2, 8, 5

S: 2, 8, 6

Cl: 2, 8, 7

Ar: 2, 8, 8

K: 2, 8, 8, 1

Ca: 2, 8, 8, 2