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19 June, 04:26

How can tell if a material has undergone a chemical change? A physical change?

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  1. 19 June, 04:47
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    Physical changes involve states of matter and energy. No new substance is created during a physical change, although the matter takes a different form. The size, shape, and color of matter may change. Also, physical changes occur when substances are mixed but don't chemically react.

    A new compound (product) results from a chemical change as the atoms rearrange themselves to form new chemical bonds. Gas released, combustion, or new substance is created
  2. 19 June, 07:33
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    A physical change is if something to change shape or color. a chemical change would be is something smelled different or something like that.
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