17 Which substance can not be broken down by a chemical change?(1) ammonia (3) propanal
2 answers:
Zirconium cannot be broken down by a chemical change, because it is an element. The others are all molecules.
(4) Zirconium
Because it cannot be broken down by chemical change neither a chemical property. It is an element. It consists of only one atom.
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Answer:
A
Explanation:
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Answer:
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