Which of the following are positron emitter :

_{20}^{38} Ca

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_{18}^{35} Ar

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_{11}^{22} Na

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_{9}^{17} F

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Solution

The correct options are
A $_{11}^{22} Na$
B $_{9}^{17} F$
C $_{18}^{35} Ar$
D $_{20}^{38} Ca$
They all have n/p ratio below stability belt so they all gives positron emission.

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Similar questions

Which of the following nuclides is positron emitter ?

(_{- 1}^{0} β)

(_{+ 1}^{0} β)

$_{20}^{49} Ca$	$_{5}^{8} B$	$_{13}^{30} Al$
$_{80}^{195} Hg$	$_{67}^{150} Ho$	$_{36}^{94} Kr$

_{36}^{84} Kr;_{80}^{200} Hg

_67^{165} Ho

Column-I	Column-II
$(A)$ $_{6}^{14} C$	$(i)$ Unstable and $β$ -emitter
$(B)$ $_{11}^{24} N a$	$(i i)$ Stable
$(C)$ $_{7}^{13} N$	$(i i i)$ Unstable, positron emitter
$(D)$ $_{6}^{13} C$	$(i v)$ Unstable, $α$ -emitter

α

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