Atom A has five protons, four neutrons, and five electrons. Atom B has five protons, six neutrons, and five electrons.
Are atoms A and B isotopes of the same element? Explain how
you know.
SELECT AN ANSWER
They are of the same element because
they have a different number of neutrons.
They are of the same element because
they have the same number of protons and
electrons, but a different number of
neutrons.
They are of the same element because
they have the same number of protons and
neutrons, but a different number of
electrons.
They are of the same element because
they have the same number of protons.
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