Which of the following has the highest first ionization energy? a. K b. Sr c. Fr

Question

Which of the following has the highest first ionization energy? a. K b. Sr c. Fr d. Co e. Nb Arrange the following in order of increasing values of electron affinity (most negative to least negative) CI Se S Cs Rb Te Which of the following equations represents the 2^nd ionization energy for Mg? a. Mg^+ (g) + e^- rightarrow Mg (g) b. Mg (g) rightarrow Mg^2+ (g) + 2e^- c. Mg (g) + 2e^- rightarrow Mg^2+ (g) d. Mg^+ (g) rightarrow Mg^2+ (g) + e^- e. Mg^2+ (g) + e^- rightarrow Mg^+ (g) Arrange the following in order of increasing magnitude of lattice energy: CaO K_2 O Rb_2 O

Explanation / Answer

(21) Nb smalle rthe size higher the inoisation energy.

(22) Cs < Rb < Te < Se < S < Cl decrease in size increases the electron affinity

(23) (d) loss of electron from unipositive ion

(24) CaO < Rb2O < K2O

Higher is the charge higher is the lattice energy. More is the size of cation more is the lattice enrgy.

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