The electron affinity of ${\mathrm{K}}_{\left(\mathrm{g}\right)}^{+}$+  ion is numerically equal to

Electron affinities are the negative ion equivalent, potassium $\left({\mathrm{K}}^{+}\right)$[𝐴𝑟], − 48  𝑘𝑗/𝑚𝑜𝑙  $4{\mathrm{S}}^1$ the general trend in the electron affinities for atoms is almost the same as  ions therefore the electron affinities of ${\mathrm{K}}_{\left(\mathrm{g}\right)}^{+}$  ion is numerically equal to ionization energy of K atom