Question

Mₓ and Mᵧ denote the atomic masses of the parent and the
daughter nuclei respectively in radioactive decay. The Q –
value for a β⁻ decay is Q₁ and that for a β⁺ decay is Q₂. If mₑ
denotes the mass of an electron, then which of the following
statements is correct?
(a) Q₁ = (Mₓ – Mᵧ) c² and Q₂ = [Mₓ – Mᵧ – 2mₑ] c²
(b) Q₁ = (Mₓ – Mᵧ) c² and Q₂ = (Mₓ – Mᵧ) c²
(c) Q₁ = (Mₓ – Mᵧ – 2me) c² and Q₂ = (Mₓ – Mᵧ + 2cₑ) c²
(d) Q₁ = (Mₓ – Mᵧ + 2me) c² and Q₂ = (Mₓ – Mᵧ + 2 mₑ)c²

Answer 1

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