A) First isotope 34 Second isotope 36
B) First isotope 44 Second isotope 46
C) First isotope 45 Second isotope 47
D) First isotope 79 Second isotope 81
Correct Answer: B
Solution :
Two isotopes of bromine are \[_{35}B{{r}^{79}},\,{{\,}_{35}}B{{r}^{81}}\] No. of neutrons in \[_{35}B{{r}^{79}}\] = \[79-35=44\] No. of neutrons in \[_{35}B{{r}^{81}}\] = \[81-35=46\].
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