Em tham khảo nha:
\(\begin{array}{l}
{ - ^{12}}{C^{16}}{O^{16}}O\\
{ - ^{12}}{C^{16}}{O^{17}}O\\
{ - ^{12}}{C^{16}}{O^{18}}O\\
{ - ^{12}}{C^{17}}{O^{17}}O\\
{ - ^{12}}{C^{17}}{O^{18}}O\\
{ - ^{12}}{C^{18}}{O^{18}}O\\
{ - ^{13}}{C^{16}}{O^{16}}O\\
{ - ^{13}}{C^{16}}{O^{17}}O\\
{ - ^{13}}{C^{16}}{O^{18}}O\\
{ - ^{13}}{C^{17}}{O^{17}}O\\
{ - ^{13}}{C^{17}}{O^{18}}O\\
{ - ^{13}}{C^{18}}{O^{18}}O
\end{array}\)
