$_{90}Th^{228}$ emits four alpha and one beta particles. The number of neutrons in the daughter element is:

The nucleus of an atom is made up of $X$ protons and $Y$ neutrons. For the most stable and abundant nuclei,

Assertion : Nuclear binding energy per nucleon is in the order $_4^9Be > \,_3^7Li > \,_2^4He$.
Reason : Binding energy per nucleon increases linearly with the difference in the number of neutrons and protons.

The radioactive decay of $_{35}X^{88}$ by a beta emission produces an unstable nucleus which spontaneously emits a neutron. The final product is

Uranium $_{92}U^{235}$ on bombardment with slow neutrons produces:

In the decay,${}_Z^AX \to {}_{6}^{12}C + {}_{+1}^{0}\beta$,identify the values of $A$ and $Z$.