1. Which of the following statements comparing ionic and covalent bonds is correct?
a) Covalent bonds tend to be less polar than ionic bonds.
b) More electrons are transferred to form covalent bonds than ionic bonds.
c) The difference between electronegativities is greater for atoms in covalent bonds
than for atoms in ionic bonds.
d) Elements on the far left side of the periodic table are more likely to form covalent bonds than ionic bonds with other atoms.

2. Using the periodic table above, which of the following molecules have a stable configuration that satisfies the octet rule for all atoms?
a) MgBr
b) MgO
c) SiO
d) KCl2

3. Which type of reaction is Mg + 2NaF -> MgF2+ 2Na?
a) combination (synthesis)
b) single replacement
c) double replacement
d) decomposition

4. Which type of reaction is 2Mg + O2 -> 2MgO?
a) combination (synthesis)
b) single replacement
c) double replacement
d) decomposition
e) combustion

5. Two carbon atoms (C, group 14) bond with two hydrogen atoms (H, group 1) to form acetylene, C2H2. Which of the following correctly describes the bonds formed by each carbon atom?
a) Each carbon atom would share one pair of electrons with a hydrogen and one pair
of electrons with the other carbon.
b) Each carbon atom would share one pair of electrons with each hydrogen and two
pairs of electrons with the other carbon.
c) Each carbon atom would share one al of electrons withone hydrogen and three
d) Each carbon atom would share two pairs of electrons with a hydrogen and two
pairs of electrons with the other carbon.