Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion

The nuclear densities of the nuclides ¹⁰₅B, ⁶₃Li, ⁵⁶₂₆Fe, ²⁰₁₀Ne and ²⁰⁹₈₃Bi can be arranged as ρ(Bi) > ρ(Fe) > ρ(Ne) > ρ(B) > ρ(Li).

Reason

The radius R of a nucleus is related to its mass number A as R = R₀A¹ᐟ³, where R₀ is a constant.