Question

which an atom of an elements is callwd which have same atomic numbers but different mass number​

Answer 1

Answer:

Isotopes are atoms that have the same atomic number (and are therefore of the same element) but different mass numbers. The composition of atoms of the naturally occurring isotopes of carbon

Answer 2

Answer:

Isotopes are atoms that have the same atomic number (and are therefore of the same element) but different mass numbers.