Which of the following statements are true? A. Unlike Ga that has a very high melting point, Cs has a very low melting point. B. On Pauling scale,…

Which of the following statements are true? A. Unlike Ga that has a very high melting point, Cs has a very low melting point. B. On Pauling scale, the electronegativity values of N and Cl are not the same. C. $\displaystyle \mathrm{Ar}, \mathrm{K}^{+}, \mathrm{Cl}^{-}, \mathrm{Ca}^{2+}$, and $\displaystyle \mathrm{S}^{2-}$ are all isoelectronic species. D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is $\displaystyle \mathrm{Si}>\mathrm{Al}>\mathrm{Mg}>\mathrm{Na}$. E. The atomic radius of Cs is greater than that of Li and Rb. Choose the correct answer from the options given below :