Question

a hupothetical radioactive nucles decays accoeding the following series a gives a1 in the.presence of alpha hypothetical radioactive nucleus decays according the following series usse 12834 the presence of Beta minus Alpha Gamma if the mass number and radioactive of respectively 18972 then the atomic number and mass number of A4 with respectively ​

Answer 1

Concept :  α decay decreases the mass number of the nucleus be 4 and decreases atomic number of nucleus by 2.

β decay increases the atomic number by 1 whereas the mass number remains the same.

In γ decay, the mass number and the atomic number remains the same.

⟹ The daughter nuclei are as follows  :

176/70​  =A 1

176 /71      =A  2

172 /69​  = A3

 and      

172 /69    = A  4

Thus, the mass number and atomic number of A4

will be 172 and 69 respectively.

Answer 2

Answer:

Concept : α decay decreases the mass number of the nucleus be 4 and decreases atomic number of nucleus by 2 . β decay increases the atomic number by 1 ...