What is a substance that can not be broken down into other substances by ordinary chemical procedures?

Answer

An element is a substance that can not be broken down into other substances by ordinary chemical procedures. The reason is that they contain atoms of the same substance.
Q&A Related to "What is a substance that can not be broken down..."
An element cannot be broken down into simpler substances by ordinary chemical methods as it conatins only atoms of the same substance.
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An element is defined
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It is called element. It is the simplest form of pure substance.
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