Explain how metal react with oxygen by giving examples
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✨✨Reactions of metals with oxygen in air..
Many metals react with oxygen to form metal oxides. Potassium and sodium are soft metal which are easily cut exposing a shiny surface which changes to dull rapidly. The change from shiny to dull is called tarnishing.
For example:
Potassium burns with a lilac flame when heated in air.
potassium + oxygen ➞ potassium oxide
4K(s) + O2(g) ➞ 2K2O(s)
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