SNC2D - DLP - Naming Covalent Compounds Quiz

What are compounds made of two nonmetals called?

• Ionic compounds

• Covalent compounds

• Molecular compounds

• Metal compounds

Answer explanation

Compounds made of two nonmetals are called Molecular compounds. The other options, Ionic compounds and Metal compounds involve a metal and a nonmetal, while Covalent compounds involve sharing of electrons but not necessarily two nonmetals only.

How are covalent or molecular compounds held together?

• By ionic bonds

• By metallic bonds

• By covalent bonds

• By hydrogen bonds

Answer explanation

Covalent or molecular compounds are held together by covalent bonds. In these bonds, atoms share electrons to achieve a stable electron configuration. This sharing allows the atoms to be connected, forming a molecule. Therefore, they are not held together by ionic bonds, metallic bonds or hydrogen bonds. The correct answer is 'By covalent bonds'.

Which elements are considered nonmetals?

• Elements to the left of the staircase on the periodic table

• Elements to the right of the staircase on the periodic table

• Elements in the middle of the periodic table

• Elements in the bottom row of the periodic table

Answer explanation

The question asks about the categorization of elements as nonmetals on the periodic table. The correct answer is that nonmetals are found to the right of the staircase. This is because, generally, elements on the right side of the periodic table have higher electronegativity and ionization energies, which are characteristic properties of nonmetals.

What is the IDE name for oxygen?

• Oxide

• Oxygenide

• Oxigen

• Ox

Answer explanation

The IDE name for oxygen is Oxide. Despite the similar sounding names, 'Oxigen' and 'Oxygenide' are not correct. 'Ox' is too short to be the name of an IDE for oxygen. Hence, the answer is 'Oxide'.

What is the name for the compound N₂O₃?

• Nitrogen oxide

• Dinitrogen trioxide

• Nitrogen trioxide

• Dinitrogen oxide

Answer explanation

The compound N2O3 is known as Dinitrogen trioxide. This name is derived from the number of nitrogen (N) and oxygen (O) atoms in one molecule of the compound. The prefix 'di-' in dinitrogen means that there are two nitrogen atoms, and the 'tri-' in trioxide means there are three oxygen atoms.

What is the IDE name for sulfur?

• Sulfuride

• Sulfide

• Sulfurine

• Sulf

Answer explanation

The question asks for the IDE name for sulfur. 'Sulfide' is the correct choice because in chemistry, the IDE suffix is often used to denote a binary compound of an element with hydrogen or another nonmetal. The other options, 'Sulfuride', 'Sulfurine', and 'Sulf', are not recognized terms in this context.

What is the name for the compound P₄S₁₀?

• Phosphorus sulfide

• Tetraphosphorus decasulfide

• Phosphorus decasulfide

• Tetraphosphorus sulfide

Answer explanation

The compound P4S10 is named based on its composition. The prefix 'tetra' refers to the four atoms of Phosphorus, and 'deca' refers to the ten atoms of Sulfur. Thus, the correct name for the compound is 'Tetraphosphorus decasulfide'. This is in line with the IUPAC nomenclature for compounds, which follows the rule of using prefixes to indicate the number of atoms of each element in a compound.

What is the name for the compound PCl₅?

• Phosphorus chloride

• Monophosphorus pentachloride

• Phosphorus pentachloride

• Monophosphorus chloride

Answer explanation

The correct answer is Phosphorus pentachloride. The compound PCl5 is named based on its constituent elements and the number of atoms. 'P' stands for Phosphorus and 'Cl' stands for Chloride. The subscript '5' after 'Cl' indicates that there are five Chloride atoms. Therefore, the compound is named as Phosphorus pentachloride.

What is the name for the compound Cl₂O?

• Dichlorine oxide

• Chlorine oxide

• Dichlorine monoxide

• Chlorine monoxide

Answer explanation

The correct answer is Dichlorine monoxide. The compound Cl2O is named following the nomenclature rules for binary molecular compounds, where the first element in the formula is named first, and the second element is named as if it were an anion. The prefix 'di-' is used to indicate two atoms of Chlorine, and 'monoxide' signifies one atom of Oxygen. Thus the name is Dichlorine monoxide.

What is the name for the compound CO?

• Carbon oxide

• Monocarbon monoxide

• Carbon monoxide

• Monocarbon oxide

Answer explanation

The correct answer is Carbon Monoxide. The chemical formula CO represents a compound made up of one atom of Carbon and one atom of Oxygen. In chemistry, mono is used to indicate one, hence the name Carbon Monoxide.