what cannot be broken down into simpler substances by physical changes of chemical reactions ?
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Elements are the simplest forms of matter and therefore cannot be broken down into simpler substances by any chemical or physical means. Elements are the building blocks for all other substances. Some examples of elements include hydrogen, oxygen, carbon, and sulfur.
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Explanation:
Answer: Elements are the simplest forms of matter and therefore cannot be broken down into simpler substances by any chemical or physical means. Elements are the building blocks for all other substances. Some examples of elements include hydrogen, oxygen, carbon, and sulfu
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