Question

The picture shows a model of a helium atom and a model of a lithium atom.


Which of the following statements is true about the lithium and the helium atoms?
A.
Lithium has more protons, neutrons, and electrons.
B.
There is no difference between helium and lithium.
C.
Helium has more protons, neutrons, and electrons.
D.
Lithium is much smaller than helium.

Answer 1

A. Lithium has more protons, neutrons, and electrons.

Reason: Helium has 2 protons and 2 electrons (and usually 2 neutrons), while lithium has 3 protons and 3 electrons (and commonly 4 neutrons), so lithium has more of each.