Chemistry - PERIODIC TABLE Question with Solution | TestHub

The first ionization energy of ${\mathrm{A}}_{(\mathrm{g})}^{-}$is equal to electron affinity of ${\mathrm{A}}_{(\mathrm{g})}$.

The second ionisation energy is always smaller than the first ionisation energy of an element.

The process ${\mathrm{O}}^{-}\to {\mathrm{O}}^{2-}$ is exothermic

The process $\mathrm{Li}\to {\mathrm{Li}}^{+}$is exothermic