Question

Explain an element has atoms with different mass number​

Answer 1

Answer:

atoms of same elements having same atomic number but different mass numbers are called isotopes.

Explanation:

hydrogen has three isotopes;

• proteum   1e, 1p, 0n  at.mass=1amu

• deutrium  1e, 1p ,1n    at,mass=2amu

• tritium       1e, 1p, 2n   at.mass=3amu