for the following atoms As As As As As Se Se Se Se Se Soluti

for the following atoms. As As: -As: As: As Se :Se- :Se: .Se. :Se:

Arsenic(As) is in the nitrogen group

Therefore it has 5 valence electrons in its outermost shell

In lewis structure valence electrons are represented by dots

Therefore 4th option is correct

Selenium(Se) is present in oxygen family

Therefore it has 6 valence electrons

Therefore it is represented by 6 dots around the structure

2nd option is correct