Elements 72Zn, 75As, and 74Ge have the same number of ________.
A) protons
B) protons and electrons
C) neutrons
D) neutrons and electrons

Question

Quizplus · Accepted Answer

The number after the element symbol indicates the mass number (sum of protons and neutrons). Since these elements have different atomic numbers (Zn=30, As=33, Ge=32), they have different numbers of protons and electrons. The same mass number with different atomic numbers means they must have the same number of neutrons to make up the mass.

Elements 72Zn, 75As, and 74Ge Have the Same Number of ________