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Standard XII
Chemistry
Beta Decay
23Na is the m...
Question
23
N
a
is the more stable isotope of
N
a
. By which process
24
11
N
a
can undergo radioactive decay?
A
β
−
−
e
m
i
s
s
i
o
n
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B
α
−
e
m
i
s
s
i
o
n
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C
β
+
−
e
m
i
s
s
i
o
n
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D
None of these
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Solution
The correct option is
D
None of these
To convert
24
11
N
a
to
23
11
N
a
, we need to decrease the mass number of
24
11
N
a
by
1
.
Since, in
β
−
emission and
β
+
emission, the mass number of product nucleus is same as that of parent nucleus.
Whereas,
in
α
emission, the mass number of product nucleus gets decreased by
4
compared to that of parent nucleus.
Thus
24
11
N
a
cannot undergo any of the radioactive decay to convert into
23
11
N
a
.
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