Elements and Compounds

Which of the following is not a compound?

• HCl
• Cl
• NaCl
• CO2

Tags

NGSS.MS-PS1-1

Which of the following represents an element?

• H₂O

• H

• NaCl

• CaCO₃

Which of the following cannot be broken down into other substances?

• Compound

• Mixture

• Solids

• Element

A pure substance made by chemically combining two or more elements

• Element

• Mixture

• Compound

• Solids

How many elements are represented in the compound?
Na₂CO₃

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-1

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element
• Compound

Tags

NGSS.MS-PS1-1

Water (H₂O) freezing is an example of:

• A chemical change
• A physical change

Tags

NGSS.MS-PS1-4

A compound consists of two or more elements bonded together.

• True

• False

Is Iron (Fe) an element or a compound?

• Element
• Compound

Tags

NGSS.MS-PS1-1

A chemical change always results in the formation of a:

• explosion
• big mess
• new substance
• new state of matter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5