Question

multiple choice question
if an atom has 2 protons and 2 neutrons, its atomic mass would be _______.
8 amu
2 amu
4 amu
0 amu

Explanation:

Step1: Recall atomic mass formula

Atomic mass = number of protons + number of neutrons

Step2: Substitute given values

Atomic mass = 2 (protons) + 2 (neutrons) = 4 amu

Answer:

C. 4 amu