Chemistry NCFE Review

This chart gives the physical properties of copper. How does the density of a 4-g sample of copper compare to that of a 12-g sample

of copper?

• Its density is one-half the density of the 12-g sample.

• Its density is the same density as the 12-g sample.

• Its density is twice the density of the 12-g sample.

• Its density is three times the density of the 12-g sample.

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NGSS.MS-PS1-2

Which is true for every atom of an element?

• It can be seen with a magnifying glass.

• It is joined together with another atom.

• It has mass and volume.

• It is weightless.

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NGSS.MS-PS1-5

A student has two pieces of aluminum foil. Each piece can be folded and rolled into a wire. Why do both pieces of aluminum foil behave the same way?

• They are composed of the same types of atoms.

• They are composed of different types of atoms.

• They have the same physical properties, but different chemical properties.

• They have the same chemical properties, but different physical properties.

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NGSS.MS-PS1-1

This table lists the density of four different substances.

If water has a density of 1.0 g/cm ³ , which substance will float on the surface of water?

• Substance W, because it is less dense than water

• Substance X, because it is more dense than water

• Substance Y, because it is more dense than water

• Substance Z, because it is less dense than water

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NGSS.MS-PS1-2

Which of these samples shown best represents an element?

• A

• B

• C

• D

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NGSS.MS-PS1-1

Which item on this element square is the chemical symbol?

• Copper

• 29

• Cu

• 63.546

An element is

• Made up of different types of atoms

• Made up of the same type of atoms

• none of the above

• all of the above

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NGSS.MS-PS1-1

How many valence electrons does Potassium Have?

• 1 Valence electron

• 2 Valence electron

• 3 Valence electron

• 4 Valence electron

• 5 Valence electron

How many valence electrons does Silicon Have?

• 1 Valence electron

• 2 Valence electron

• 3 Valence electron

• 4 Valence electron

• 5 Valence electron

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NGSS.MS-PS1-1

This shows a table salt molecule. What is it?

• compound

• element

• mixture

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NGSS.MS-PS1-1