Question

How many valence electrons does each atom of arsenic (As) have? Arsenic is element 33. It is in period 4 and family 15 (5A or the Nitrogen family).

a) 5 valence electrons
b) 6 valence electrons
c) 8 valence electrons
d) 7 valence electrons

Answer 1

Arsenic has 5 valence electrons.

Step-by-step explanation:

Arsenic has 5 valence electrons. In the p block, the number of valence electrons is equal to the group number minus ten, and arsenic is in group 15, so it has 5 valence electrons.

The eight valence electrons, a full outer s and p sublevel, give the noble gases their special stability.