Question

In the Rutherford nuclear-atom model, ________.

A)the heavy subatomic particles, protons and neutrons, reside in the nucleus

B)the three principal subatomic particles (protons, neutrons, and electrons) all have essentially the same mass

C)the light subatomic particles, protons and neutrons, reside in the nucleus

D)mass is spread essentially uniformly throughout the atom

Answer 1

A, the protons and neutrons are heavier than electrons. The electrons orbit the nucleus, and have negligible mass.