Assertion:The whole mass of the atom is concentrated in the nucleus.
Reason:The whole mass of the atom is concentrated in the nucleus
Reason:The mass of a nucleus can be either less than or more than the sum of the masses of nucleons present in it.

The question given below consist of an assertion (A) and a reason ( R). Use the following key to choose the appropriate answer to these questions from the codes (a), (b), ( c) and (d) given below: (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true but R is NOT the correct explanation of A. (c) A is true but R is false. (d) A is false and R is also false. Assertion: The whole mass of the atom is concentrated in the nucleus. Reason: The mass of the nucleus can be either less or more than the sum of the masses of nucleus.

Give the scientific reason : All the mass of an atom is concentrated in the nucleus.

The mass of a nucleus can be either less than or more than the sum of the masses of nucleons present in it. The whole mass of the atom is considered in the nucleus.

Why a nucleus has mass less than the sum of the masses of the individual nucleons in it.

Why the mass of the nucleus is less than the sum of masses of the nucleons?

The reason for Rutherford’s conception that the whole of positive charge in an atom is concentrated in the nucleus is