How the metals react with oxygen? Give the general formula and explain the reaction of sodium with oxygen with chemical equation.

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.

Sodium reacts with oxygen to form sodium oxide and has the following balanced chemical equation: 4Na+O2→2Na2O 4 N a + O 2 → 2Na2O .

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

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