PHYS SCI Unit 2 Test Review

Is this bond Ionic or Covalent?

• Ionic

• Covalent

Tags

NGSS.HS-PS1-1

What is the correct formula for Lithium Oxide?

• Li2O

• LiO2

• LiO

• Li2O2

Tags

NGSS.HS-PS1-2

Is water an ionic or covalent compound?

• Ionic, because is has a low melting point

• Ionic, because it has a high melting point

• Covalent, because it has a low melting point

• Covalent, because it has a high melting point

Tags

NGSS.HS-PS1-1

Where is the mistake?

• Covalent compounds do not dissociate into ions in an aqueous solution.

• Covalent compounds dissociate into ions in an aqueous solution.

• Covalent compounds always conduct electricity in an aqueous solution.

• Covalent compounds are always soluble in water.

Which type of bond has a higher melting point?

• Ionic bonds

• Covalent bonds

Which model is correct?

• 1

• 2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

NGSS.HS-PS1-3

Covalent bonds form between...

• nonmetals + nonmetals.

• metals + nonmetals.

• metals + metals.

• noble gases.

Ionic bonds form between...

• metals + nonmetals.

• nonmetals + nonmetals.

• metals + metals.

• noble gases.

What is the correct name for MgF2?

• Magnesium Fluoride.

• Magnesium Chloride.

• Magnesium Oxide.

• Magnesium Sulfide.

What is the chemical formula for Sodium Chloride?

• NaCl

• KCl

• NaOH

• H2O