Question

XII. What an atom of an element is called which have same atomic number but different mass

number?

A) Isobars B) lsotopes C) Valency D) None of the these​

Answer 1

Answer:

lsotopes    

Explanation:

Atoms of the same element having the same atomic number but different mass are called isotopes. They have a same number of protons and electrons but a different number of neutrons. For example: Hydrogen - protium (

1

1

​

H), deuterium (

1

2

​

H) and tritium (

1

3

​

H) are isotopes.