Ionic Compounds Quiz

What is the charge of an ionic compound overall?

• Zero

• Varies

• Negative

• Positive

Answer explanation

The charge of an ionic compound overall is zero because the positive and negative charges balance each other out.

What type of bond is formed between a metal and a nonmetal?

• Covalent

• Hydrogen

• Ionic

• Metallic

Answer explanation

Ionic bonds are formed between a metal and a nonmetal, where electrons are transferred from the metal to the nonmetal, resulting in the formation of positively and negatively charged ions.

What is the charge of a cation?

• Neutral

• Positive

• Zero

• Negative

Answer explanation

A cation is a positively charged ion, therefore the correct charge of a cation is positive.

Which method is used to determine the number of each ion in an ionic compound?

• Multiplication

• Crisscross Applesauce

• Subtraction

• Addition

Answer explanation

Crisscross Applesauce method is used to determine the number of each ion in an ionic compound by swapping the charges and using them as subscripts for each ion.

What is the formula for magnesium phosphide?

• MgP

• MgP₂

• Mg₂P₃

• Mg₃P₂

Answer explanation

The correct formula for magnesium phosphide is Mg3P2, as it indicates the ratio of magnesium atoms to phosphorus atoms in the compound.

What is the correct name for CaS?

• Calcium Sulfur

• Calcium Sulfite

• Calcium Sulphide

• Calcium Sulfate

Answer explanation

The correct name for CaS is Calcium Sulphide, as it is a compound formed by the elements calcium and sulfur.

What is the charge of ammonium?

• -1

• +1

• 0

• +2

Answer explanation

Ammonium has a charge of +1 due to the presence of one extra proton compared to the number of electrons, making it positively charged.

What is the correct name for Na₃PO₄?

• Sodium Phosphate

• Sodium Phosphide

• Sodium Phosphorus Oxide

• Sodium Phosphite

Answer explanation

Na3PO4 is correctly named Sodium Phosphate because it contains sodium cations (Na+) and phosphate anions (PO4^3-).

What is the correct formula for Calcium Chloride?

• CaCl

• CaCl₂

• Ca₂Cl

• CaCl₃

Answer explanation

The correct formula for Calcium Chloride is CaCl2.

Tags

NGSS.MS-PS1-1

How is the oxidation state of an element in a compound determined?

• By the number of electrons it shares

• By the number of electrons it gains or loses

• By the total number of protons

• By the total number of neutrons

Answer explanation

The oxidation state of an element in a compound is determined by the number of electrons it gains or loses.