Elements, Compounds, and Mixtures

Which is the smallest unit of structure in an element that gives its identity?

• atom

• electron

• neutron

• proton

Which type of matter can be separated by physical means?

• atom

• element

• compound

• mixture

Which diagram best represents a homogenous mixture?

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Which diagram best represents a compound?

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Tags

NGSS.MS-PS1-1

Which diagram best represents an element?

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Tags

NGSS.MS-PS1-1

Which diagram best represents a heterogeneous mixture?

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Which material is best to use to separate iron filings from sand?

• air

• water

• magnet

• filter paper

Tags

NGSS.MS-ETS1-2

Which is an example of a pure substance?

• air

• diamond

• milk

• cereals with milk

Tags

NGSS.MS-PS1-4

Which chemical cannot be further broken down into other chemicals using ordinary laboratory processes?

• NaCl

• H₂O

• Fe

• CaCO₃

The chemical formula for carbon monoxide is $CO$  while carbon dioxide is  $CO_2$  . What does the subscript in oxygen (O) indicate?

• the number of oxygen atoms in each substance

• the number of mixtures that the oxygen is forming

•  the number of compounds that the oxygen is forming

•  whether the oxygen is forming a compound or a mixture

Tags

NGSS.MS-PS1-1