A) \[_{6}{{C}^{13}},\,{{\,}_{7}}{{N}^{13}}\]
B) \[_{6}{{C}^{13}},\,{{\,}_{7}}{{N}^{14}}\]
C) \[_{7}{{N}^{14}},\,{{\,}_{8}}{{O}^{16}}\]
D) \[_{7}{{N}^{13}},\,{{\,}_{8}}{{O}^{18}}\]
Correct Answer: A
Solution :
Isobars are the atoms of different elements that have same mass number \[(A)\] but different atomic number. Hence, \[_{6}{{C}^{13}}\] and \[_{7}{{N}^{13}}\] is a pair of isobars.
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