Atoms Compounds Molecules Mixtures

Which of the following represents an element?

• H₂O
• H₂
• NaCl
• CaCO₃

Tags

NGSS.MS-PS1-1

Which of the following is not a compound?

• HCl
• Cl₂
• NaCl
• CO₂

Tags

NGSS.MS-PS1-1

A molecule is

• two or more atoms bonded together
• one type of atom
• smaller than an atom 
• an element

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NGSS.MS-PS1-1

Compounds are made up of :

• 2 or more atoms that are the same type
• 2 or more atoms of different types
• 3 or more carbon atoms
• 2 or more oxygen atoms

Tags

NGSS.MS-PS1-1

The basic unit of matter is

• a mixture
• a substance
• an atom
• a compound

A substance that contains only one type of atom is a(n)

• compound
• element
• heterogeneous mixture
• homogeneous mixture

Which of these is not an example of a molecule?

• CH₄
• C
• C₆H₁₂O₆
• H₂O

Tags

NGSS.MS-PS1-1

This picture represents which of the following?

• element
• compound
• mixture of elements
• mixture of compounds

Tags

NGSS.MS-PS1-1

This picture represents which of the following?

• element
• compound
• mixture

Tags

NGSS.MS-PS1-1

This picture represents which of the following?

• element
• compound
• mixture

Tags

NGSS.MS-PS1-1