Chapter 7

Write equations corresponding to the following. a. the fourth ionization energy of Se b. the electron affinity of ${\mathrm{S}}^{-}$ c. the electron affinity of ${\mathrm{Fe}}^{3+}$ d. the ionization energy of Mg

An ionic compound of potassium and oxygen has the empirical formula KO. Would you expect this compound to be potassium(II) oxide or potassium peroxide? Explain.

Give the name and formula of each of the binary compounds formed from the following elements. a. Li and N b. Na and Br c. K and S

Cesium was discovered in natural mineral waters in 1860 by R. W. Bunsen and G. R. Kirchhoff using the spectroscope they invented in 1859. The name came from the Latin caesius (“sky blue”) because of the prominent blue line observed for this element at 455.5 nm. Calculate the frequency and energy of a photon of this light.

The bright yellow light emitted by a sodium vapor lamp consists of two emission lines at 589.0 and 589.6 nm. What are the frequency and the energy of a photon of light at each of these wavelengths? What are the energies in kJ/mol?

Predict the atomic number of the next alkali metal after francium and give its ground-state electron configuration.

Small daily doses of lithium carbonate taken orally are often given to treat manic-depressive psychoses. This dosage maintains the level of lithium ion in the blood at about $1\times {10}^{-3}\mathrm{mol}/\mathrm{L}$ . a. What is the formula of lithium carbonate? b. What mass of lithium ion is present per liter of blood in these patients?

Complete and balance the equations for the following reactions. a. $\mathrm{Li}(s)+{\mathrm{N}}_2(g)\to$ b. $\mathrm{Rb}(s)+\mathrm{S}(s)\to$

Complete and balance the equations for the following reactions. a. $\mathrm{Cs}(s)+{\mathrm{H}}_2\mathrm{O}(l)\to$ b. $\mathrm{Na}(s)+{\mathrm{Cl}}_2(g)\to$

An unknown element is a nonmetal and has a valence electron configuration of $n{s}^{2}n{p}^4.$ a. How many valence electrons does this element have? b. What are some possible identities for this element? c. What is the formula of the compound this element would form with potassium? d. Would this element have a larger or smaller radius than barium? e. Would this element have a greater or smaller ionization energy than fluorine?