PS Unit 3a: Chemical Bonding (Fall 24)

Which of the following is a characteristic of ionic compounds in solid state?

• They conduct electricity well.

• They have low melting points.

• They are brittle and hard.

• They are malleable and ductile.

What type of bond involves the sharing of electron pairs between atoms?

• A. It is an ionic bond because electrons are being transferred.

• B. It is a covalent bond because electrons are being shared.

• C. It is a metallic bond because electrons are delocalized.

• D. It is a hydrogen bond because electrons are being shared.

Tags

NGSS.MS-PS1-1

Which of the following molecules is primarily held together by covalent bonds?

• NaCl

• CO₂

• MgO

• KBr

Tags

NGSS.MS-PS1-1

What is the net charge of a stable molecule?

• 0

• +1

• -1

• +2

Which of the following compounds is formed by an ionic bond?

• CH₄

• MgO

• SO₂

• NH₃

In chemical reactions with metals, what does a fluorine (F) atom typically do?

• fuses electrons.

• loses electrons.

• shares electrons.

• gains electrons.

Tags

NGSS.MS-PS1-5

What happens during the formation of an ionic bond?

• protons are transferred

• electrons are shared equally

• neutrons are exchanged

• electrons are transferred from one atom to another

Tags

NGSS.MS-PS1-5

What is the primary characteristic of a covalent bond?

• the exchange of electrons

• the mutual sharing of electron pairs

• the exchange of protons

• the mutual sharing of proton pairs

What is the chemical formula for the stable ionic compound formed between potassium and sulfur?

• K₂S

• KS

• K₂S₂

• K₃S

Marlene is analyzing a mysterious substance in her lab. Select three compounds that exhibit similar properties to this substance.

• NaCl

• KCl

• C₁₂H₂₂O₁₁

• MgSO₄

• CH₃OH

Tags

NGSS.HS-PS1-3