Quiz

QUIZ

1. Cations and anions can bind together in what are called what kinds of bonds?

a. Covalent bonds b. Metallic bonds c. Hydrogen bonds d. Ionic bonds

Answer: d. The type of bonding that goes on with cations and anions is called ionic bonding.

2. What type of bonding only occurs between nonmetals that share electrons?

a. Covalent bonds b. Metallic bonds c. Hydrogen bonds d. Ionic bonds

Answer: a. Covalent bonding only occurs between nonmetals and other nonmetals. There is a relative sharing of electrons between the atoms in this type of bonding.

3. Which molecule is considered covalently bonded?

a. CH4 b. NaCl c. KPO4 d. KOH

Answer: a. Each of these is considered an ionically-bonded molecule except for CH4, which is methane gas. Methane gas is covalently bonded.

4. Which type of bonding is considered an electrostatic attraction?

a. Covalent b. Nonionic c. Ionic d. Metallic

Answer: c. Ionic bonding is the electrostatic attraction between a positively-charged cation and a negatively-charged anion.

5. What is the charge on the hypochlorite ion?

a. +1 b. -1

c. -2 d. -3

Answer: b. Hypochlorite is a -1 anion, as is chlorite, chlorate, and perchlorate.

6. Which anion has a -3 charge?

a. Hydroxide b. Sulfate c. Peroxide d. Phosphate

Answer: d. Phosphate is the only polyatomic anion that has a -3 charge.

7. What is the molecular formula for aluminum sulfide?

a. AlS b. Al2S3 c. AlS2 d. AlS3

Answer: b. Al2S3 is the right answer because Aluminum has a +3 charge and sulfide has a -2 charge. In order to balance this, there needs to be two aluminum atoms for every three sulfide atoms.

8. Lead IV has is an ion that can combine with oxygen to make lead oxide. What is the molecular formula for this?

a. Pb(IV)O b. Pb2O2 c. PbO4 d. PbO2

Answer: d. Lead IV has a 4+ charge that will ultimately fit well with oxygen, which has a -2 charge. This leads to PbO2 or Pb(IV)O2 as the molecular formula.

9. Sodium nitrate has what type of bonding?

a. Ionic bonding b. Metallic bonding c. Ionic and covalent bonding d. Covalent bonding

Answer: c. There is combined ionic and covalent bonding, which involves ionic bonding between sodium and nitrate as well as covalent bonding between the nitrogen and oxygen molecules in the nitrate ion.

10. Which atom follows the duet rule rather than the octet rule?

a. Hydrogen b. Oxygen c. Carbon d. Nitrogen

Answer: a. Hydrogen follows the duet rule because it is the only atom that does not involve a p orbital so it only has a 1s orbital with two electrons desired by the orbital.