A) 3 and 5
B) 5 and 3
C) 3 and 3
D) 3 and 1
Correct Answer: D
Solution :
When \[\text{-}\]particle is emitted, mass number decreases by 4 units and atomic number by 2 units. When \[\text{-}\]particle is emitted, mass number remains same while atomic number increases by 1 unit. Let \[\text{a-}\text{-}\]particles and \[\text{b-}\text{-}\]particles be emitted. Then from conservation of mass number \[234=222+4a\] \[\Rightarrow \] \[a=\frac{234-222}{4}=3\] From conservation of atomic number (charge) \[92=87+2a-b\times 1\] or \[92-87=2\times 3-b\] \[\Rightarrow \] \[b=6-5=1\] \[\therefore \] \[a=3,b=1\]
You need to login to perform this action.
You will be redirected in
3 sec
