(A) different number of protons (X)
(B) same number of neutrons (X)
(C) different number of neutrons ()
(D) same mass number (nucleon number) (X)
Answers: Isotopes of the same elements has different number of neutrons.
(A) different number of protons (X)
(B) same number of neutrons (X)
(C) different number of neutrons ()
(D) same mass number (nucleon number) (X)
Answers: Isotopes of the same elements has different number of neutrons.
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