Question

If the atomic number of an element is 20. Calculate the number of electrons in its valence shell and its valency. *

Answer 1

Answer:

jnwnsnssmdmdmdmkzmdsnav

Explanation:

jnnaajajjssjnwnwnssjnd d

Answer 2

Answer:

2 electrons

Explanation:

Atomic number=20

electronic configuration-2,8,8,2

so,it has a valence electron as 2 and

it has two electrons in its valence shell.