Decays into plus

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

30.

{ }_{88}^{226} \mathrm{Ra}

decays into

{ }_{86}^{222} \mathrm{Rn}

plus (A) a proton (B) a neutron (C) an electron (D) a helium nucleus

\left({ }_{2}^{4} \mathrm{He}\right)