Question
In a given reaction,
In a given reaction,
$$_Z{X^4}{ \to _{Z + 1}}{Y^4}{ \to _{Z - 1}}{K^{A - 4}}{ \to _{Z - 1}}{K^{A - 4}}$$
Radioactive radiations are emitted in the sequence of
A.
$$\alpha ,\beta ,\gamma $$
B.
$$\gamma ,\alpha ,\beta $$
C.
$$\beta ,\alpha ,\gamma $$
D.
$$\gamma ,\beta ,\alpha $$
Answer :
$$\beta ,\alpha ,\gamma $$
Solution :
When a nucleus emits an alpha particle, its mass number decreases by 4 and charge/atomic no. decreases by 2. In $$\beta $$-particle emission, mass remains same but atomic number is increased by one, In $$\gamma $$-decay, daughter nucleus has the same charge number and same mass number as those of parent nucleus. Hence, sequence is
When a nucleus emits an alpha particle, its mass number decreases by 4 and charge/atomic no. decreases by 2. In $$\beta $$-particle emission, mass remains same but atomic number is increased by one, In $$\gamma $$-decay, daughter nucleus has the same charge number and same mass number as those of parent nucleus. Hence, sequence is