Question

The smallest unit of a pure substance which always exist independently and can retain all the properties of the substance is called the smallest unit of a pure substance which always exist independently and can retain all the properties of the substance is called________.

Answer 1

Answer:

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Explanation:

An atom is the smallest unit of a pure substance or element that can exist and still retain the properties of the original substance or element. ... each element is made up of identical particles of matter called atoms

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Answer 2

Answer:

The smallest unit of a pure substance which always exist independently and can retain all the properties of the substance is called an atom.