Question

1. Considering the trends in ionization energies, would you expect sodium or potassium to be more reactive? Explain.

2. Considering the trends in atomic radii, would you expect cesium or radon to have the larger radius? Explain.

3. Compare the ionization energies of sodium and rubidium and then compare the electron affinities of chlorine and iodine. Which of the following chemical combinations of the elements would be the most exothermic - Na and Cl, Na and I, Rb and Cl, Rb and I? Explain.

4. Chlorine is used extensively as a disinfectant and bleaching agent. Without regard to adverse effects or costs, would bromine be a more or less effective disinfectant and bleaching agent? Explain.

5. Is fluorine gas predicted to be more or less reactive than chlorine gas? Explain.

6. Not much is known of the chemistry of astatine. Would you expect astatine to more or less reactive than iodine?

7. Predict the reactivity of silicon metal relative to that of magnesium and aluminum. Explain.

8. Is barium hydroxide predicted to be more or les soluble that Ca(OH)3? Explain.

9. Is barium sulfate predicted to be more or less soluble that CaSO4? Explain.

Answer 1

1.

Sodium, since it has less mass and same charge i.e. electronegativity

2.

Expect Radon to have more size, since it has larger mass

3.

most exothermic --> Na and Cl, since there is the most electronegative change

4.

Less, since Chlorine has more electronegativity, less size

5.

more reactive, since has more electronegativity

6.

less reactive, since it has more mass

7.

they cant be compared since Mg and Al are metals and Si is a metalloid

8.

Less solbule, Ca(OH)3 is not likely to exist

9.

Less soluble, since it has larger mass