Covalent and Ionic Compounds Review

• Nitrogen oxide

• Dinitrogen pentoxide

• Nitrogen pentaoxide

• Dinitrogen oxide

Answer explanation

The correct name for the covalent compound N2O5 is Dinitrogen pentoxide.

• H-O-H with 4 lone pairs on the oxygen

• H=O=H with no lone pairs on the oxygen

• H-O-H with 2 lone pairs on the oxygen

• H-O-H with no lone pairs on the oxygen

Answer explanation

The correct Lewis structure for water is H-O-H with 2 lone pairs on the oxygen, making it the correct choice.

• Carbon dioxide

• Carbon oxide

• Monocarbon dioxide

• Carbon monoxide

Answer explanation

The covalent compound CO2 is named Carbon dioxide, as it consists of one carbon atom and two oxygen atoms.

• C surrounded by 4 H, with no lone pairs on carbon

• C double bonded to 2 H, with 2 lone pairs on carbon

• C triple bonded to H, with 1 lone pair on carbon

• C surrounded by 2 H, with 2 lone pairs on carbon

Answer explanation

The correct Lewis structure for methane is C surrounded by 4 H, with no lone pairs on carbon.

• Phosphorus pentachloride

• Phosphorus chloride

• Monophosphorus pentachloride

• Phosphorus chlorate

Answer explanation

The correct name for the covalent compound PCl5 is Phosphorus pentachloride.

• N with 3 H attached and 1 lone pair on nitrogen

• N with 3 H attached and no lone pairs on nitrogen

• N triple bonded to 3 H with no lone pairs

• N double bonded to 3 H with 1 lone pair

Answer explanation

The correct Lewis structure for ammonia, NH3, is N with 3 H attached and 1 lone pair on nitrogen.

• Sulfur trioxide

• Sulfur oxide

• Monosulfur trioxide

• Sulfur monoxide

Answer explanation

The covalent compound SO3 is named as Sulfur trioxide, following the naming convention for covalent compounds where the prefix indicates the number of atoms of each element.

• C with 2 double-bonded O, no lone pairs on carbon

• C with 2 single-bonded O, 2 lone pairs on each oxygen

• C triple bonded to one O and single bonded to another O

• C surrounded by 2 O with 1 lone pair on each oxygen

Answer explanation

The correct Lewis structure for carbon dioxide is C with 2 double-bonded O, no lone pairs on carbon.

• Sulfur hexafluoride

• Sulfur fluoride

• Monosulfur hexafluoride

• Sulfur hexachloride

Answer explanation

The correct name for the covalent compound SF6 is Sulfur hexafluoride, as it consists of one sulfur atom and six fluorine atoms.

• Two C atoms double bonded, each C bonded to 2 H

• Two C atoms single bonded, each C bonded to 3 H

• Two C atoms triple bonded, each C bonded to 1 H

• Two C atoms double bonded, each C bonded to 1 H

Answer explanation

The correct Lewis structure for ethylene is two C atoms double bonded, each C bonded to 2 H.