Question

please solve this please​

Answer 1

Answer:

16 neutrons

At.number=Protons+Neutrons

31=15+n

n=31-15=16

Answer 2

Answer:

16

Explanation:

Mass number (A) = No. of protons (Z) + No. of neutrons

But the mass number is given as 31 and the number of protons is 15.

No. of protons (Z) + No. of neutrons = 31

Number of neutrons = 31 – number of protons

Number of neutrons = 31 – 15 = 16