Matter and Elements Practice

1. Dissolving sugar into water is a:

Chemical Change
Physical Change
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2. Burning natural gas in a propane torch is a:

Chemical Change
Physical Change
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3. Dissolving table salt into water is a:

Chemical Change
Physical Change
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4. Reacting Pb(NO3)2 with KI to form a new substance PbI2 is a:

Chemical Change
Physical Change
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5. Complete burning of paper produces:

Ashes and carbon dioxide gas.
Water and carbon dioxide gas.
Ashes and carbon monoxide gas.
All of the above.
None of the above.
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6. The smallest piece of an element that retains the properties of that element is:

a proton.
an electron.
an atom.
All of the above.
None of the above.
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7. True or false: Two elements can have exactly the same chemical and physical properties.

True.
False
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8. New substances can be formed by:

combining two or more elements.
combining an element with another substance that is a combination of elements.
combining two or more substances that are each combinations of elements.
All of the above.
None of the above.
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9. True or false: All elements naturally occur.

True.
False
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10. True or false: Most common substances can be described using 25 elements.

True.
False
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