Question

can u tell me the answer please​

Answer 1

Answer:

Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.Isotopes of an element have different physical properties because they have different mass numbers

Answer 2

Answer:

The answer is (c) different number of neutrons