Atoms, Molecules, and Ions

	2-1	Describe the properties of the electron as seen in cathode rays. Describe the means by which J. J. Thomson determined the ratio e/m  for the electron.
	2-2	Describe Millikan's oil-drop experiment and indicate what property of the electron he was able to measure.
	2-3	Cite the evidence from studies of radioactivity for the existence of subatomic particles.
	2-4	Describe the significance of Moseley's experiment.
	2-5	Describe the experimental evidence for the proton.
	2-6	Describe the experimental evidence for the nuclear nature of the atom.
	2-7	Describe in general terms the mass spectrometer and calculate the atomic weight of an isotope given the abundances and masses of its isotopes [see C3].
	2-8	Give the approximate size, relative mass, and charge of an atom, proton, neutron, and electron.
	2-9	Describe the composition of an atom in terms of protons, neutrons, and electrons.
	2-10	Write the chemical symbol for an element, having been given its mass number and atomic number, and then perform the reverse operation.
	2-11	Use the periodic table to predict whether an element is a metal or nonmetal.
	2-12	Distinguish between covalent and ionic substances.
	2-13	Distinguish among empirical formulas, molecular formulas, and structural formulas.
	2-14	Write the simplest formula of a compound, having been given the charges of the ions from which it is made.
	2-15	Write the name of a simple inorganic compound, having been given its chemical formula, and perform the reverse operation.

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