Covalent, Ionic, and Metallic Bonding & Naming Review

What is the chemical formula of lead (II) sulfate?

• PbSO₄

• Pb₂(SO₄)₂

• Pb₂SO₄

• Pb(SO₄)₂

Answer explanation

Lead (II) has a +2 charge. Sulfate ions have a -2 charge. You will need one atom of lead to balance 1 unit of sulfate. In ionic naming, the subscripts are not a part of the naming.

Which statement below correctly describes carbon dioxide?

• Carbon dioxide has an ionic crystalline structure.

• The atoms in a carbon dioxide molecule are bonded covalently.

• A sample of carbon dioxide gas has a definite shape.

• A carbon dioxide molecule contains two atoms of carbon and two atoms of oxygen.

What is the accepted IUPAC name for the compound Ca₃N₂?

• Tricalcium dinitride

• Tricalcium nitride

• Dicalcium trinitride

• Calcium nitride

What is the IUPAC name for the compound CF₃?

• carbon trifluoride

• monocarbon trifluoride

• carbon fluoride

• carbon (III) fluoride

Compounds can be classified as covalent or ionic by noting the location on the periodic table for each atom in the compound. Choose two (2) compounds from the answer choices that are classified as covalent.

• sulfur dioxide

• sodium chloride

• carbon monoxide

• potassium bromide

• magnesium chloride

Tags

NGSS.MS-PS1-1

Based on the position of the elements on the periodic table, what is the chemical formula for calcium phosphide?

• Ca₃P₂

• Ca₂P₃

• Ca₂P₂

• Ca₃P₃

Nitrogen is found in group 15 on the periodic table. How many electrons will nitrogen lose or gain to become stable?

• Lose 1

• Lose 2

• Lose 3

• Gain 2

• Gain 3

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following would form a covalent bond? Choose two correct answers.

• carbon (C) + nitrogen (N)

• fluorine (F) + hydrogen (H)

• sodium (Na) + oxygen (O)

• magnesium (Mg) + phosphorus (P)

• lead (Pb) + copper (Cu)

Tags

NGSS.HS-PS1-2

Compounds are classified as either ionic or covalent based upon -

• the total number of neutrons after bonding takes place

• the type of chemical bonds they contain

• the amount of thermal energy produced by a reaction

• the number of valence electrons in the resulting compound

Tags

NGSS.HS-PS1-1

The element chlorine is in group 17; therefore, chlorie has ​ (a)   valence electrons and needs to ​ (b)   to reach octet​.

• 7
• gain 1
• 5
• 6
• 8
• gain 2
• lose 2
• lose 1

Tags

NGSS.HS-PS1-1