Atoms of the same type can have different mass numbers. These atoms are called
"isotopes".
Consider two electrically-neutral isotopes of carbon (C):
One carbon atom has a mass number of 12.
. One carbon atom has a mass number of 14.
.
(A) Which subatomic particle (protons, neutron, electron) do these two atoms have
in common? How are they similar?
(B) Which subatomic particle (protons, neutron, electron) is different among these
two atoms? How are they different? Answer Both A and B