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Chemistry
Chemistry
Problem
Atoms
7
A
^{7}A
7
A
,
8
B
^{8}B
8
B
and
9
C
^{9}C
9
C
are such that
8
B
^{8}B
8
B
is an isobar of
7
A
^{7}A
7
A
and atom
9
C
^{9}C
9
C
is isotone to
8
B
^{8}B
8
B
. The number of neutrons in
7
A
^{7}A
7
A
are.....
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