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are pure substances that cannot be broken down into a simpler form.

are units of two or more atoms.

are the smallest possible particles of an element.

are pure substances made of two or more atoms of different elements.

User Greg Elin
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2 Answers

7 votes

Answer:

element

compound

???

mixture

User Ricardo Faria
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1 vote

element molecule adam compound

User Shamaleyte
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