Periodic Properties of the Elements

	7.1	Explain the effect of increasing nuclear charge on the radial density function in many-electron atoms.
	7.2	Explain the variation in atomic radii among the elements, as shown in figure 7.5 of the text, and predict the relative sizes of atoms based upon their position in the periodic table.
	7.3	Explain the observed changes in values of the successive ionization energies for a given atom.
	7.4	Explain the general variations in the first ionization energies among the elements, as shown in figures 7.6 and 7.7 of the text, and relate these variation to variation in atomic radii.
	7.5	Explain the variations in electron affinity among the elements.
	7.6	Describe the periodic trends in metallic and nonmetallic behavior.
	7.7	Describe the general differences in chemical reactivity between metals and nonmetals.
	7.8	Describe the general physical and chemical behavior of the alkali metals and alkaline earth metals, and explain how their chemistry relates to their position in the periodic table.
	7.9	Write balanced equations for the reaction of hydrogen with metals to form metal hydrides.
	7.10	Write balanced equations for simple reaction between the active metals (groups 1A and 2A) and the nonmetals in groups 6A and 7A.
	7.11	Write balanced equations for the reactions of hydrogen with nonmetals such as oxygen and chlorine.
	7.12	Describe the allotropy of oxygen.
	7.13	Explain the dominant reactions of oxygen and relate these to its position in the periodic table.
	7.14	Describe the physical states and colors of the halogens, and explain the trends in reactivity with increasing atomic number in the family.
	7.15	Describe the physical states and colors of the halogens, and explain the trends in reactivity with increasing atomic number in the family.

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