Question

Explain how metal react with oxygen by giving examples​

Answer 1

✨✨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)