Naming Ionic Compounds (STF)

Which of the following are found in an ionic compound?

• Anion and Anion

• Cation and Anion

• Cation and Cation

• Molecule and Formula Unit

Answer explanation

Ionic compounds consist of cations (positively charged ions) and anions (negatively charged ions). The correct choice, 'Cation and Anion', reflects this fundamental characteristic of ionic compounds.

Tags

NGSS.HS-PS1-3

Which of the following are found in an ionic compound?

• Noble Gases and Halogens

• Metal and Nonmetal

• Metal and Metal

• Nonmetal and Halogen

Answer explanation

Ionic compounds consist of metals and nonmetals. Metals lose electrons to form positive ions, while nonmetals gain electrons to form negative ions, resulting in ionic bonds. Therefore, the correct choice is 'Metal and Nonmetal'.

Tags

NGSS.HS-PS1-2

What suffix is used at the end of the second element in a binary ionic compound?

• -ide

• -ite

• -ate

• -ade

Answer explanation

In a binary ionic compound, the second element's name is modified by adding the suffix '-ide'. This indicates that the element is a simple anion, distinguishing it from polyatomic ions which use '-ite' or '-ate'.

When is the suffix -ite used when naming ionic compounds with oxyanions?

• It is used when there is no oxyanion.

• It is used when there are more than two oxyanions.

• It is used when naming the oxyanion with one fewer oxygen atom than the most common oxyanion.

• It is used when naming the oxyanion with one more oxygen atom than the most common oxyanion.

Answer explanation

The suffix -ite is used to name an oxyanion that has one fewer oxygen atom than the most common form of that oxyanion, distinguishing it from the -ate form which has more oxygen atoms.

What suffix is used for the most common oxyanion? This is also the anion with one more oxygen atom than the -ite oxyanion.

• -ide

• -ite

• -ade

• -ate

Answer explanation

The suffix '-ate' is used for the most common oxyanion, which has one more oxygen atom than the '-ite' oxyanion. For example, sulfate (SO4^2-) is the '-ate' form of sulfite (SO3^2-).

What are used to indicate the charge or oxidation state of an ionic compound with a transition metal?

• Roman numerals

• Arabic numerals

• Letters

• Plus or minus signs

Answer explanation

Roman numerals are used to indicate the charge or oxidation state of transition metals in ionic compounds, as these metals can have multiple oxidation states. This helps clarify the specific charge of the metal in the compound.

The suffixes -ic (higher charge) and -ous (lower charge) can be used to indicate the charge or ___________ ________ instead of Roman numerals when naming ionic compounds with transition metals.

• period

• oxidation state

• group

• letters

Answer explanation

The suffixes -ic and -ous indicate the oxidation state of transition metals in ionic compounds. -ic denotes a higher charge, while -ous indicates a lower charge, providing a way to name compounds without using Roman numerals.

When naming an ionic compound what comes first?

• Nonmetal

• Higher charge

• Cation

• Anion

Answer explanation

In naming ionic compounds, the cation (positive ion) is always named first, followed by the anion (negative ion). This convention helps to clearly identify the components of the compound.

When naming an ionic compound what comes second?

• Nonmetal

• Higher charge

• Cation

• Anion

Answer explanation

In naming an ionic compound, the cation (positive ion) is named first, followed by the anion (negative ion). Therefore, the correct answer is 'Anion', as it comes second in the naming convention.

Name the following ionic compound: BeCl₂

• beryllium chlorine

• beryllium chlorate

• beryllium chloride

• beryllium dichloride

Answer explanation

The compound BeCl2 consists of beryllium (Be) and chlorine (Cl) ions. The correct name is beryllium chloride, as it indicates the presence of two chloride ions. 'Beryllium dichloride' is also correct but less commonly used.