- (D) The name carbon-13 supplies enough information to determine the
number of all three subatomic particles. The name carbon indicates 6 protons
as carbon has only 6 protons. Since atoms are neutral, an equal number of
electrons must be present; therefore, carbon-13 has 6 electrons. The number
that follows the name, 13, indicates the mass number of the atom, which counts
the number of protons and neutrons. Since the atom has 6 protons, it must
contain 7 neutrons.
marvins-underground-k-12
(Marvins-Underground-K-12)
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