Question

1. what are different about the isotopes carbon - 12, carbon - 13 and carbon - 14? (select the correct two options) the isotopes have different atomic mass. the isotopes have different number of neutrons. the isotopes have different number of protons. the isotopes have different atomic number.

Explanation:

Isotopes are atoms of the same element with the same number of protons (hence same atomic number) but different numbers of neutrons, which leads to different atomic masses. For carbon - 12, carbon - 13, and carbon - 14, they are all carbon isotopes with 6 protons (since atomic number of carbon is 6), but different numbers of neutrons and thus different atomic masses.

Answer:

The isotopes have different atomic mass.
The isotopes have different number of neutrons.