Chemical Bonding Practice Test

Given the equation representing a reaction: H + H → H₂. What occurs during this reaction?

• A bond is broken and energy is absorbed.

• A bond is broken and energy is released.

• A bond is formed and energy is absorbed.

• A bond is formed and energy is released.

Tags

NGSS.HS-PS1-4

Which equation represents energy being absorbed as a bond is broken?

• H + H → H₂ + energy

• H + H + energy → H₂

• H₂ → H + H + energy

• H₂ + energy → H + H

Tags

NGSS.HS-PS1-4

An atom of which element has the strongest attraction for electrons in a chemical bond?

• chlorine

• carbon

• phosphorus

• sulfur

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element reacts with oxygen to form ionic bonds?

• calcium

• hydrogen

• chlorine

• nitrogen

What occurs when two atoms of bromine react to form a molecule of bromine?

• A bond is broken as energy is released.

• A bond is broken as energy is absorbed.

• A bond is formed as energy is released.

• A bond is formed as energy is absorbed.

Tags

NGSS.HS-PS1-4

Which element forms an ionic compound when it reacts with lithium?

• K

• Fe

• Kr

• Br

Which compound contains both ionic and covalent bonds?

• ammonia

• methane

• sodium nitrate

• potassium chloride

Tags

NGSS.HS-PS1-1

Which substance contains bonds that involved the transfer of electrons from one atom to another?

• CO₂

• NH₃

• KBr

• Cl₂

Which is the formula of an ionic compound?

• SO₂

• CO₂

• CH₃OH

• NaOH

A substance conducts electricity in the liquid phase but not in the solid phase. This substance can be classified as

• covalent

• ionic

• metallic

• molecular

Tags

NGSS.HS-PS1-3