The element iron (Fe) occurs naturally as four isotopes. Each of these isotopes has
A. 26 protons.
B. 26 electrons.
C. a different number of neutrons.
D. all of the above
Answer:D
The element iron (Fe) occurs naturally as four isotopes. Each of these isotopes has
A. 26 protons. B. 26 electrons. C. a different number of neutrons. D. all of the above