Which two elements make up water? oxygen and phosphorus
oxygen and hydrogen
hydrogen and sulfur
hydrogen and phosphorus

To find out what water is made of, it helps to look at its formula, which is H2O. This basically tells us that the water molecule is composed of two elements: hydrogen and Oxygen or, more precisely, two hydrogen atoms (H2) and one oxygen atom (O). hydrogen and Oxygen are gases at room temperature

Because they are stupid and insensitive