Periodic table of videos Hydrogen.

 Hydrogen has the atomic number 1.

1. Hydrogen is the lightest element, it is twice as light as helium, and its atoms are four times as light as Helium atoms.

2. Hydrogen is in water in the form of H2O. Water is also found in a form which has Deuterium in stead of Helium.

3. Hydrogen is very reactive, it burns easily. When a lit match is put to a balloon with Hydrogen in it, it explodes.

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