Question

On adding a neutron to the nucleus of an atom, change will be observed in its

• A. Atomic number
• B. Mass number
• C. Electronic configuration
• D. Chemical properties

Answer 1

The correct option is B

Mass number

Some important features of neutrons are:

1. The neutrons does not carries any charge.
2. When the neutrons are added to the nucleus, it changes the mass number of nucleus but atomic number remains same.
3. Thus, the isotopes of different mass numbers are formed.

As, the atomic number and electronic configuration of an atom remains unchanged. The chemical properties changes when there is change in their atomic number of an atom.

Final answer:

Hence, option (B) is correct.