Question

Write the electronic configuration of any one pair of isotopes and isobars. ​

Answer 1

Isotopes :
${}_6^{14}C$ and ${}_6^{12}C$
Isotopes have same electronic configuration as they contain same number of electrons, Hence the electronic configuration can be given as,
$2,4$
Isobars :
${}_{20}^{40}Ca$ and ${}_{18}^{40}Ca$. They contain different number of electrons and the electronic configuration can be given as,
${}_{20}^{40}Ca:2,8,8,2$
${}_{18}^{40}Ar:2,8,8$