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ANTONII [103]
3 years ago
9

An unknown substance is made only of identical atoms that cannot be broken down. This substance is a ________.

Chemistry
2 answers:
kherson [118]3 years ago
8 0

Answer: Element

Explanation:

Element is a pure substance which is composed of identical atoms. It can not be decomposed into simpler constituents using chemical reactions.Example: Silver (Ag)

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: carbon dioxide (CO_2)

Thus an unknown substance is made only of identical atoms that cannot be broken down is an element.

Veseljchak [2.6K]3 years ago
7 0
The substance is an element off of the periodic table. 
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