what happen when active metal react with oxygen? give one example.
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11
Answer:
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. Potassium burns with a lilac flame when heated in air.
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4
Answer:
It gets forms oxide. eg lithium
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