Question

How many protons are in an element with an atomic number of 8 and a mass number of 18?
a. 8
b. 10
c. 18
d. 3

Answer 1

a)8,atomic number also means proton number

Answer 2

Since the atomic number is 8 that will be the number of protons given that the element is a neutral element meaning that the number of protons and electrons are the same. Therefore the answer is 8