Question

Masses of two isobars ₂₉Cu⁶⁴ and ₃₀Zn⁶⁴ are 63.9298 u and 63.9292 u. It can be concluded from this

(1) Both isobars are stable

(2) Zn⁶⁴ is radioactive decaying to Cu⁶⁴ through β decay

(3) Cu⁶⁴ is radioactive decaying to Zn⁶⁴ through γ decay

(4) Cu⁶⁴ is radioactive decaying to Zn⁶⁴ through β decay

Answer 1

(4) Cu⁶⁴ is radioactive decaying to Zn⁶⁴ through β decay

In β decay process atomic number increases by 1 whereas mass number remains same. Hence the possible nuclear reaction is