Question

What happens when metals react with oxygen ? Write an example

Answer 1

when metals react with oxygen, the metal atoms tend to lose electrons to the oxygen atoms, changing their oxidation state and characteristically their colour. This is why rust is red, copper can be green or blue and why transition metals can provide us with bright and colourful solutions.

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Answer 2

Answer:

Many metals react with oxygen to form metal oxides. Potassium and sodium are soft metals that are easily cut exposing a shiny surface that changes to dull rapidly. The change from shiny to dull is called tarnishing. Potassium burns with a lilac flame when heated in the air.

Explanation:

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