# NEET Physics Nuclei Questions Solved

A radioactive nucleus undergoes a series of decay according to the scheme

$A\stackrel{\alpha }{\to }{A}_{1}\stackrel{\beta }{\to }{A}_{2}\stackrel{\alpha }{\to }{A}_{3}\stackrel{\gamma }{\to }{A}_{4}$

If the mass number and atomic number of A are 180 and 72 respectively, then what are these number for ${A}_{4}$?

(1) 172 and 69                         (2) 174 and 70

(3) 176 and 69                         (4) 176 and 70