The atomic number for hydrogen is 1.

I got a cramp in my leg while swimming.

Sometimes water becomes a precious commodity.

Water changes into vapor when it is heated.

There is quite a bit of water remaining.

The water rose to a level of 10 meters.

The chemical formula for water is H2O.

Water, forests, and minerals are important natural resources.

Unless I miss my guess, he is forty.

The snowstorm raged for a full week.