Ionic Compounds Review

What type(s) of elements are needed to form an ionic compound?

• Only non-metals

• Metalloids and non-metals

• Only metals

• Metals and non-metals

Answer explanation

Ionic compounds are formed when metals transfer electrons to non-metals, creating charged ions that attract each other. Therefore, both metals and non-metals are necessary to form ionic compounds.

What type of charge do cations hold?

• Negative

• Positive

• Neutral

• Variable

Answer explanation

Cations are positively charged ions formed when an atom loses one or more electrons. This loss of negatively charged electrons results in a net positive charge, making 'Positive' the correct answer.

What is the chemical formula for a compound formed between Sodium and Fluorine?

• NaF2

• Na2F2

• NaF

• Na2F

Answer explanation

The compound formed between Sodium (Na) and Fluorine (F) is NaF. Sodium has a +1 charge and Fluorine has a -1 charge, resulting in a 1:1 ratio, hence the formula NaF. The other options do not reflect the correct ionic charges.

Tags

NGSS.MS-PS1-1

What is the name for AlN?

• Aluminum Nitride

• Aluminum Nitrate

• Aluminum Nitrite

• Aluminum Oxide

Answer explanation

AlN stands for Aluminum Nitride, which is a compound made of aluminum and nitrogen. The other options, such as Aluminum Nitrate and Aluminum Nitrite, refer to different chemical compounds.

Tags

NGSS.MS-PS1-1

What is the overall charge on an ionic compound?

• Negative

• Variable

• Positive

• Neutral

Answer explanation

Ionic compounds consist of positively and negatively charged ions. The overall charge is neutral because the total positive charge from cations balances the total negative charge from anions.

What is the charge on iron in FeO?

• +2

• +3

• +4

• +1

Answer explanation

In FeO, iron (Fe) has a charge of +2. This is because oxygen (O) typically has a charge of -2, and to balance the charges in the compound, iron must have a +2 charge.

What type of elements form anions?

• Metals

• Nonmetals

• Transition Elements

• Isotopes

Answer explanation

Nonmetals tend to gain electrons to achieve a full outer shell, forming anions. In contrast, metals typically lose electrons to form cations. Therefore, nonmetals are the elements that primarily form anions.

What is the charge of all of the elements in group 2?

• +3

• -2

• They are all different

• +2

Answer explanation

Elements in group 2 of the periodic table, also known as alkaline earth metals, typically have a charge of +2. This is due to their tendency to lose two electrons to achieve a stable electron configuration.

What is the chemical formula for a compound that forms between magnesium and sulfur?

• MgS

• Mg2S2

• Mg2S

• MgS2

Answer explanation

The compound formed between magnesium (Mg) and sulfur (S) is magnesium sulfide. Magnesium has a +2 charge and sulfur has a -2 charge, resulting in a 1:1 ratio, giving the formula MgS. Other options do not represent the correct stoichiometry.

Tags

NGSS.MS-PS1-1

What is the chemical formula for a compound that forms between aluminum and oxygen?

• AlO3

• AlO

• Al3O2

• Al2O3

Answer explanation

The correct formula for the compound formed between aluminum and oxygen is Al2O3. This is because aluminum has a +3 charge and oxygen has a -2 charge, requiring two aluminum ions to balance with three oxide ions.

Tags

NGSS.MS-PS1-1