A uranium atom is 238 times as massive as a hydrogen atom. Compared with the diameter of a hydrogen atom, uranium's size is
A)slightly smaller.
B)only slightly larger.
C)is much larger, but less than 238 times as large.

Question

Quizplus · Accepted Answer

The size of an atom is determined by its electron cloud, not directly by its mass. While uranium has more protons, neutrons, and electrons than hydrogen, the increase in size is not proportional to the mass increase. Uranium's diameter is only slightly larger than hydrogen's because atomic size does not scale linearly with mass.

A Uranium Atom Is 238 Times as Massive as a Hydrogen