NEET2026Physics-Nuclear Physics
NEET 2026 Physics Nuclear Density MCQ Question
Type: MCQ-numerical-Medium-Class 12
An unknown nucleus has a nuclear density of 2.29 × 10¹⁷ kg/m³ and mass of 19.926 × 10⁻²⁷ kg. Its mass number A is approximately: (Take R₀ = 1.2 × 10⁻¹⁵ m, 4π = 12.56)
A
12
B
20
C
16
D
19
Correct Answer
Option A
Detailed Explanation
Using the formula for nuclear density ρ = mass/volume and volume V = 4/3 πR³, where R = R₀A¹/³, we can solve for A. Substituting the given values, we find A ≈ 12.
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