Consider a neutral atom with 30 protons and 34 neutrons.The mass number for this atom is ________.
A)30
B)32
C)34
D)64
E)94

Question

Quizplus · Accepted Answer

The mass number of an atom is the sum of its protons and neutrons. Therefore, the mass number of this atom is 30+34=64, making the best choice (D). Choices A, B, C, and E are incorrect because they do not represent the correct sum of protons and neutrons.

Consider a Neutral Atom with 30 Protons and 34 Neutrons