Nuclear Chemistry - Result Question 11
11. Decrease in atomic number is observed during
(1998, 2M)
(a) alpha emission
(b) beta emission
(c) positron emission
(d) electron capture
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Answer:
Correct Answer: 11. (a,c,d)
Solution:
- In the following nuclear reactions, there occur decrease in atomic number $(Z)$
$ \begin{aligned} { } _Z X^{A} & \longrightarrow{ } _2 He^{4}+{ } _{Z-2} Y^{A-4}, \alpha-\text { emission } \\ { } _Z X^{A} & \longrightarrow{ } _{+1} e^{0}+{ } _{Z-1} Y^{A}, \text { positron emission } \\ { } _Z X^{A}+{ } _{-1} e^{0} & \longrightarrow{ } _{Z-1} Y^{A} \text {, electron capture } \end{aligned} $
In beta emission, increase in atomic number is observed.
${ }Z X^A \longrightarrow{ }{-1} e^0+{ }_{z+1} Y^A, \beta$-emission
BETA
