Unit 4 Review: Bonding and Ionic Naming

When metals bond with non-metals they form what type of bonds

• metallic

• ionic

• polar covalent

• nonpolar covalent

Answer explanation

When metals bond with non-metals, they typically form ionic bonds. This occurs because metals lose electrons to become positively charged ions, while non-metals gain those electrons to become negatively charged ions, resulting in an ionic bond.

Tags

NGSS.HS-PS1-1

What is the correct formula for the compound, lithium oxide?

• LiO

• Li₂O

• LiO₂

• Li₂O₂

Answer explanation

Lithium oxide is formed from lithium (Li) and oxygen (O). Each lithium atom has a +1 charge, and oxygen has a -2 charge. To balance the charges, two lithium atoms are needed for one oxygen atom, resulting in the formula Li₂O.

What is the chemical formula for Beryllium phosphide?

• Be₃P₃

• BeP

• Be₂P₃

• Be₃P₂

Answer explanation

Beryllium phosphide consists of beryllium (Be) and phosphorus (P). Due to beryllium having a +2 charge as an ion and Phosphorous having a -3 charge as an ion, the correctly balanced formula is Be3P2.

Tags

NGSS.HS-PS1-2

What is the chemical formula for magnesium sulfide?

• MgS

• Mg₂S₂

• Mg₂S₃

• MgS₆

Answer explanation

Only 1 magnesium ion with a +2 charge is needed to balance a formula with 1 oxygen ion, which carries a -2 charge.

Name the compound AlBr₃

• aluminum bromide

• aluminum tribromide

• aluminum bromine

• aluminum boride

Answer explanation

The compound AlBr₃ is named aluminum bromide, as it consists of aluminum and bromine. The ending of the nonmetal in an ionic compound name changes to "-ide".

Name the compound Ba(OH)₂

Answer explanation

The compound Ba(OH)2 is named barium hydroxide. It consists of barium (Ba) and hydroxide (OH) ions, hence the name reflects its components.

What is the name of the compound CuO?

• Copper(II) oxide

• Copper(I) oxide

• Copper oxide

• Copper(II) oxate

Answer explanation

The compound CuO is named Copper(II) oxide because it contains copper with a +2 charge.

The name of Cu₃N₂ is

• copper (III) nitride

• copper (II) nitride

• copper nitride

• tricopper dinitride

Answer explanation

Cu₃N₂ indicates copper with a +2 charge (Cu²⁺) and nitride (N³⁻). The formula shows 3 copper ions for every 2 nitride ions, leading to the name copper (II) nitride, which is the correct choice.

Tags

NGSS.HS-PS1-2

What is the formula for the compound Cobalt (II) Phosphide?

• CoP

• Co₂P₃

• Co₄P

• Co₃P₂

Answer explanation

Cobalt (II) Phosphide consists of cobalt ions with a +2 charge and phosphide ions with a -3 charge. To balance the charges, we need 3 cobalt ions for every 2 phosphide ions, resulting in the formula Co₃P₂.

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Nonpolar covalent bonds have electronegativity differences between 0 and 0.6. Polar covalent bonds have differences between 0.6 and 1.7. Ionic compounds have differences greater than 1.7. What type of bond forms between Fluorine and Sulfur?

• Metallic

• Nonpolar covalent

• Polar covalent

• Ionic

Answer explanation

The electronegativity difference between Fluorine and Sulfur is approximately 1.5, which falls within the range for polar covalent bonds (0.6 to 1.7). Therefore, the bond formed is polar covalent.

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1