The distinction between an "element" and an "isotope" is
A) an element has a specific number of both protons and neutrons; an isotope has a specific number of protons.
B) an element has a specific number of neutrons; an isotope has a specific number of both protons and neutrons.
C) an element has a specific number of protons; an isotope has a specific number of neutrons.
D) these two words have the same meaning, but "element" is used by chemists while "isotope" is used by physicists.
E) an element has a specific number of protons; an isotope has a specific number of both protons and neutrons.
E
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