Question

Statement-1 : Nuclide ³⁰Al₁₃ is less stable than ⁴⁰Ca₂₀
Statement-2 : Nuclide having odd number of protons and
neutrons are generally unstable.

Answer 1

Explanation:

Statement 1 is correct but statement 2 is not the complete explanation

Answer 2

Both the statements are correct and statement 2 correctly describes statement 1.

Explanation:

• The statement 1 says that ⁴⁰Ca₂₀ is more stable than ³⁰Al₁₃.

• In ³⁰Al₁₃, the number of Proton = 13.

• Number of Neutron = 17.

• In ⁴⁰Ca₂₀, the number of proton = 20.

• Number of neutron = 20.

• The np ratio of ³⁰Al₁₃ is > 1.

• While the np ratio of ⁴⁰Ca₂₀ is equal to 1.

• As the species with odd number of protons and neutrons are less stable than those with even number of protons and neutrons, so ⁴⁰Ca₂₀ is more stable than ³⁰Al₁₃.

• So statement 2 correctly describes statement 1.

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