COMPOUND, MOLECULES AND MIXTURES

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Last updated 7:52 AM on 6/15/26
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5 Terms

1
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What defines a molecule?

A group of two or more atoms held together by chemical bonds.

2
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Is Oxygen (O2) a compound?

No It is a molecule (atoms are bonded), but it is not a compound because it consists of only one type of element.

3
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Does the formula NaCl represent a single molecule?

No it represents a 1:1 ratio of ions in a giant ionic crystal structure.

4
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How many atoms of oxygen are in Ca(OH)2?

Two. The subscript 2 outside the bracket multiplies the oxygen inside.

5
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Why can you separate a mixture by physical methods?

Because the substances in a mixture are not chemically bonded to each other.