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11 December, 12:37

If a metal changes color overtime from exposure to air what has likely occurred?

• A reversible change

• A chemical change

• A physical change

• A change of state

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Answers (2)
  1. 11 December, 13:05
    0
    The answer would be: a chemical change.

    One of the indicators of a chemical change is a change in color. This is seen in rusting metal. When exposed over time to air, metal changes color. The substance composition has changed through the breaking of bonds and formation of new bonds.
  2. 11 December, 14:29
    0
    A chemical change. The change in color and the exposure to air indicate that what probably occurred was oxidation which is a chemical change.
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