Question

A nucleus ᵐₙX emits one α-particle and two β-particles.
The resulting nucleus is
(a) ᵐ⁻⁶ₙ₋₄Z
(b) ᵐ⁻⁶ₙZ
(c) ᵐ⁻⁴ₙX
(d) ᵐ⁻⁴ₙ₋₂Y

Answer 1

( c ) ᵐ⁻⁴ₙX

In alpha decay, decreases 4 unit mass number and 2 unit atomic number.

In beta decay, increases one unit atomic number but mass will remain same.

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