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What is a pure substance that contains only one atom called?

User Siddhu
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2 Answers

6 votes
a pure substance with only one atom is a compound
User Zonily Jame
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5 votes
It's called an element.

Eg: Oxygen is an element and if we had 100g of it it would only contain Oxygen atoms.

An compound contains two or more elements such as Sodium Chloride. NaCl contains both Na and Cl atoms.

Hope this helps. Message me if you want any more help.
User Brian Huey
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