Question

Mass of isotopes of same element are???

Answer 1

Because different isotopes have different numbers of neutrons, they do not all weigh the same or have the same mass. Different isotopes of the same element have the same atomic number. They have the same number of protons. The atomic number is decided by the number of protons.

Answer 2

Hey friend !!

Mass of isotopes of same element are same.

Hope it helps.. ^_^