What element is 2H2O?

A water molecule (formally known as dihydrogen monoxide) is composed of two hydrogen atoms and one oxygen atom. But you can’t simply take two hydrogen atoms and stick them onto an oxygen atom. The actual reaction to make water is a bit more complicated: 2H2 + O2 = 2H2O + Energy.

What is the name for 2H2O?

Answer: hydrogen peroxide. Explanation: hydrogen peroxide is the chemical name of the reactant and the products are hydrogen and oxygen.