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1. The modern organization of elements is based upon the law that the properties of the
elements occur periodically when the elements are arranged in increasing order by their
a. molar masses
b. reactivity with oxygen
c. atomic numbers
2. Which of the following is a nonmetallic group of elements?
a. Li, Na, K, Rb
b. H, He, Li, Be
c. F, Cl, Br, I
d. B, Al, Sc, Y
3. Elements in the same family or group tend to have the same _______
a. atomic numbers
b. atomic masses
c. numbers of valence electrons
d. electron configurations
4. What is the nature of the relationship between atomic radius and ionization energy
a. As the atomic radius increases, the ionization energy increases.
b. As the atomic radius increases, the ionization energy decreases.
c. As the atomic radius decreases, the ionization energy increases to a point, then
d. As the atomic radius decreases, the ionization energy decreases to a point, then
5. The formation of a Li+ ion results from _____.
a. lithium gaining an electron because it has a high electronegativity
b. lithium gaining an electron because it has a low ionization energy
c. lithium losing an electron because it has a high electronegativity
d. lithium losing an electron because it has a low ionization energy
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6. Sodium (Na), a very reactive metal, reacts with molecular chlorine (Cl 2), a poisonous gas,
to yield table salt.
a. Sodium has a low ionization energy and chlorine has a low electronegativity
b. Sodium has a high ionization energy and chlorine has a high electronegativity
c. Sodium has a low ionization energy and chlorine has a high electronegativity
d. Sodium has a high ionization energy and chlorine has a low electronegativity
7. Between atoms in a covalent bond, _______
a. electrons lose their charge.
b. electrons are shared.
c. electrons are gained or lost in order to create ions
d. electrons are repelled by other electrons
8. ionic compounds tend to exist as, ______
a. solids, liquids and gases
b. liquids and gases
c. solids and liquids.
9. In which of the following situations will a dipole occur?
a. The bond angles of a molecule are symmetrical.
b. All of the terminal atoms are the same.
c. When all the bonded atoms have the same eletronegativity.
d. There is a single unshared pair around the central atom.
Generally speaking the presence of an unshared pair will produce a polar compound.
There are examples of compounds where that does not occur. For example, compounds
that model the AX2E3 (linear) arrangement will have three symmetrically positioned
unshared pairs in the central plane.
10. Which of the following compounds are NOT polar?
b. H 2O
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11. The CCl4 molecule does not behave as a polar molecule because _______.
a. the C-Cl bonds are nonpolar
b. the C-Cl bonds are ionic
c. the bond dipoles cancel
d. the shape of the molecule is bent
12. Which of the following compounds is bent with bond angles of less than 120?
13. Which of the following is a resonance structure?
14. Which of the following possess Van Der Waal forces ONLY?
a. H 2O
15. Which of the following possess hydrogen bonds?