Question

Element A has 15 protons. Determine the number of neutrons in its isotope with mass number 33.

A)15

B)18

C)33

D)48

the answer is B your welcome

Answer 1

18

Step-by-step explanation:

Answer 2

In an electrically neuteral atom, number of protons = number of electrons = atomic number.
Mass number = neutrons + protons/electrons/atomic number
Therefore,
neutrons = mass number - protons/electrons/atomic number
Neutrons = 33 - 15 = 18

The answer is thus B. But this is the solution and explanation along with it as proof.