The ratio of the numbers of neutrons to protons in the nucleus of naturally occurring isotopes tends to vary with atomic number in what manner?
A)increases with greater atomic number
B)decreases with greater atomic number
C)is maximum for atomic number = 60
D)remains constant for entire range of atomic numbers

Question

Quizplus · Accepted Answer

The ratio of neutrons to protons in the nucleus of naturally occurring isotopes generally increases with a greater atomic number. This is because as atoms get larger, they require a greater proportion of neutrons to protons to help stabilize the nucleus against the increasing electrostatic repulsion between protons.

The Ratio of the Numbers of Neutrons to Protons in the Nucleus