When the cations Na^+, K^+, Rb^+, Cs^+ are combined with chloride ion in the gas

Question

When the cations Na^+, K^+, Rb^+, Cs^+ are combined with chloride ion in the gas phase to form ion pairs, which pair formation releases the greatest amount of energy? NaCI KCI RbCI CsCI All release the same amount of energy. Which of the following compounds would be expected to have the lowest melting point? NaF MgF_2 AIF_3 CaF_2 RbF The ground-state electron configuration of the Mg^2+ ion is 1s^2 2s^2 2p^6. 1s^2 2s^2 2p^6 3s^2 1s^2 2s^2 2p^6 3s^2 3p^2. 1s^2 2s^2 2p^3. 1s^2 2s^2 2p^1. Which of the following is the Lewis dot structure for the lithium ion? How many valence electrons are present in the Lewis formula for the perchlorate ion, ClO_4^-? 30 32 34 36 38

Explanation / Answer

1) ---a

2) ---a

3) ---a

4) ----b

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