Topic: Ionization enthalpy and electron gain enthalpy· Classification of Elements and Periodicity in Properties
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. Ar, K^+, Cl^-, Ca^2+, and S^2- are all isoel…
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. Ar, \(\mathrm{K^+}\), \(\mathrm{Cl^-}\), \(\mathrm{Ca^{2+}}\), and \(\mathrm{S^{2-}}\) are all isoelectronic species.
D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si > Al > Mg > Na.
E. The atomic radius of Cs is greater than that of Li and Rb.
Choose the correct answer from the options given below :
1. A, B, and E only
2. C and E only
3. C and D only
4. A, C and E only