How many electrons does 3115P3− contain?

How many electrons does 31₁₅P³⁻ contain?

A. 12
B. 15
C. 16
D. 18

Correct Answer:

Option D = 18

Explanation

– Phosphorus also has 15 electrons.

– Here we have P³⁻ which means that this atom has gained 3 electrons. So, P³⁻ has 18 electrons.