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

Tags

NGSS.MS-PS1-1

What is made up two or more elements that are chemically combined?

• Element
• Mixture
• Compound
• Solids

Tags

NGSS.MS-PS1-1

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element
• Compound

Tags

NGSS.MS-PS1-1

Is water an element or a compound?

• Element
• Compound

Tags

NGSS.MS-PS1-1

Both elements and compounds are pure substances.

• Agree

• Disagree

Every compound has a chemical formula.

• Agree

• Disagree

Tags

NGSS.MS-PS1-1

Carbon, Ar, and Ne are examples of elements.

• Agree

• Disagree

How many different elements are in the compound?

• 12

• 3

• 24

• 6

Tags

NGSS.MS-PS1-1

What is the difference between Co and CO?

• CO is an element but Co is a compound

• Nothing is different. They are the same thing.

• CO is two elements and Co is only one element

• Co is not a pure substance

Tags

NGSS.MS-PS1-1