1. Define and distinguish between fact, observation, inference, hypothesis, scientific
law, theory, and model.
2. List four criteria for judging theories.
3. Describe and distinguish between these categories of materials: mixtures, solutions,
pure substances, compounds and elements.
4. Relate (equate, memorize) the names and symbols for the following elements: Ag, Al,
Ar, Au, B, Ba, Be, Br, C, Ca, Cl, Co, Cr, Cu, F, Fe, H, He, Hg, I, K, Li, Mg, Mn, N, Na,
Ne, Ni, O, P, Pb, S, Si, Sn, Ti, Zn.
5. Locate these elements on the periodic table and identify the group and period for
each.
6. Use the names of compounds to determine what elements are present in them.
7. State and recognize the basic points of Dalton's Atomic Theory. Describe Dalton's
model of atoms.
8. Define "relative atomic weight." Give a brief history of
atomic weight standards, and cite the reasons for the changes that have been made.
9. Define "mole" (without using or even knowing about Avogadro's number). (If
you must use Avogadro's number, explain why that particular number was chosen.)
10. Describe the relationship between the mole and the atomic weight (and also the
formula or molecular weight).
11. Convert from grams to moles and from moles to grams.
12. Define "compound" and "molecule" and distinguish between them.
Criticize the statement "Elements are made of atoms and compounds are made of
molecules."
13. State Avogadro's Hypothesis and explain how it relates to molecules and compounds
and elements. Describe the differences between Avogadro's "molecule" and
Dalton's "compound atom."
14. Express the composition of chemicals using formulas. Given the number of each kind
of atom in a compound, write its formula--and vice versa.
15. Define and distinguish between empirical and molecular (and structural) formulas.
16. Define and calculate formula weights (including molecular weights) given the
formula of a chemical and the appropriate atomic weights.
17. Determine the composition (weight percent) of a compound from its formula and a
list of atomic weights.
18. Determine the empirical formula of a compound from its composition or similar data.
19. Experimentally determine the molecular weight of gases.
20. Determine the molecular formula of a compound given its empirical formula and its
molecular weight.
Find the sections in your text that deal with the following topics and read them.
