Question

Answer choices
a. 13
b. 15
c. 28
d. 30
:))

Answer 1

15 neutrons

Step-by-step explanation:

Number of neutrons = atomic mass - number of protons.

So Neutrons = 28 - 13 protons

(Since atom is neutral, number of electrons = number of protons, which is how I get the 13 protons)

Neutrons = 15

Answer 2

I hope this helps


The answer is b. 15