Unit 6 Practice Test

BrP

• Bromide phosphide

• Bromide phosphate

• Monobromide monophosphide

• Bromide monophosphide

Answer explanation

BrP stands for Bromide monophosphide, which indicates one bromide and one phosphide ion. The other options either misrepresent the ions or suggest multiple units, making 'Bromide monophosphide' the correct choice.

CO

• Carbon Oxide

• Carbon Oxygen

• Dicarbon dioxide

• Carbon Monoxide

Answer explanation

CO stands for Carbon Monoxide, a colorless, odorless gas that is toxic to humans. The other options do not accurately represent the chemical formula CO.

As₄O₁₀

• arsenic oxide

• quadarsenic decoxide

• tetraarsenic decoxide

• arsenic decoxide

Answer explanation

The formula As4O10 indicates four arsenic (As) atoms and ten oxygen (O) atoms. The prefix 'tetra-' denotes four, making 'tetraarsenic decoxide' the correct name, as 'deco-' indicates ten oxygen atoms.

What is the prefix for one?

• Mono

• Uno

• Due

• Muni

Answer explanation

The prefix 'Mono' means one, derived from Greek. 'Uno' is Spanish for one, while 'Due' means two in Italian, and 'Muni' is not a recognized prefix. Therefore, 'Mono' is the correct answer.

What is the name of the compound P₂O₅

• Pentaphosphorus dioxide

• Phoshphide dioxide

• Diphosphorus pentoxide

Answer explanation

The compound P2O5 is named Diphosphorus pentoxide, indicating it contains two phosphorus (P) atoms and five oxygen (O) atoms. The other options are incorrect as they do not accurately reflect the composition of the compound.

P₃F₄

• Phosphorous fluoride

• Triphosphorous tetrafluoride

• Phosphate Fluoride

• Trifluoride hexafluoride

Answer explanation

The formula P3F4 indicates three phosphorus (P) atoms and four fluorine (F) atoms. This is named triphosphorous tetrafluoride, which correctly describes the ratio of the elements in the compound.

What is the name of the compound SO₂

• Monosulfate oxide

• Sulfur Dioxide

• Monosulfur dioxide

Answer explanation

The compound SO2 is commonly known as Sulfur Dioxide. It consists of one sulfur atom and two oxygen atoms, which is accurately reflected in its name. The other options do not correctly represent this compound.

Tribromine nonoxide

• Br₃O₉

• Br₃O₁₀

• Br₃O₆

• Br₃O₄

Answer explanation

Tribromine nonoxide indicates a compound with three bromine atoms and nine oxygen atoms. The correct formula is Br₃O₉, as it matches the naming convention for this compound.

Name the following ionic compound: Cs₂S

• cesium sulfide

• cesium sulfate

• cesium (II) sulfate

• cesium (II) sulfide

Answer explanation

The compound Cs2S consists of cesium (Cs) and sulfide (S) ions. Since cesium has a +1 charge and sulfide has a -2 charge, the correct name is cesium sulfide, not sulfate or any other variation.

What kind of bond forms between a cation and an anion?

• Chemical bond

• Ionic bond

• Covalent bond

• Electron bond

Answer explanation

An ionic bond forms between a cation (positively charged ion) and an anion (negatively charged ion) due to the electrostatic attraction between them. This type of bond is distinct from covalent or electron bonds.