In uranium radioactive series, initial nucleus `""^(238)U_(92)` decays to final nucleus `""^(206)U_(82)`. In this process, the number of `alpha`-particles and `beta`-particles emitted are

Options

A. 8 and 3
B. 16 and 6
C. 16 and 3
D. 8 and 6

Answer

D

Explanation

In decay, `""_(92)^(238)U rarr ""_(82)^(206)U`
Mass number reduces by `Delta A = 32 = 4 xx 8` and proton number is reduces by `DeltaZ = 10 = 2 xx 8 -6`
So, `8 alpha`-particles and `6 beta^(-)`. Particles must be emitted.