Question

chemical equation of lack of oxygen

Answer 1

It's written like O2 because oxygen uses two oxygen (O) atoms. Similarly, water uses two hydrogen atoms and one oxygen atom. The 2 or 3 or 243,688 denotes the number of that element's atoms in the molecule (chemical formula). For example, H2O means it has two hydrogen atoms and one oxygen atom.

Answer 2

Priestley, however, called oxygen " dephlogisticated air " , and did not recognise it as a chemical element . The name oxygen was coined in 1777 by Antoine Lavoisier, who first recognised oxygen is a chemical element and correctly characterized the role it plays in combustion.

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