1.

The isotopes of an element differ in(A) the number of neutrons in the nucleus (B) the charge on the nucleus (C) the number of extra-nuclear electrons (D) both the nuclear charge and the number of extra-nuclear electrons

Answer»

Correct Option is : (A) the number of neutrons in the nucleus

Isotopes elements have same number of protons but differ in number of neutrons.

Option : (A) the number of neutrons in the nucleus



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