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A radioactive nucleus undergoes a series...

A radioactive nucleus undergoes a series of decay according to the scheme
`A oversetalphato A_1 oversetbetato A_2 oversetalpha to A_3 oversetgammato A_4`
if the mass number and atomic number of A are 180 and 72 respectively, then what are these number for `A_3`

A

171 and 69

B

174 and 70

C

176 and 69

D

176 and 70

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The correct Answer is:
A
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RESONANCE ENGLISH-NUCLEAR PHYSICS-Exercise
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