Hi Valerie,
Isotopes of an element have the same number of protons and electrons but varying number of neutrons.
The answer is b.
Valerie V.
asked • 02/21/16physical science
Isotoes of an element have the same number of___.
a. neutrons but different numbers of protons
b. protons but different numbers of neutrons
c. neutrons and electrons
d. protons and neutrons.
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