The first element on the Periodic Table

Basic Information

Symbol - H

Atomic Number - 1

Atomic Weight - 1.008

Group - 1

Period - 1

Color - Colourness

Classification - Non-metallic

Additional Information


Henry Cavendish (1731-1810) discovered Hydrogen in 1766 at London, England.


Hydrogenation of fats and oils, rocket fuel, welding, and prodution of hydrochloric acid.


Hydrogen is the lightest element. It is by far the most abundant element in the universe and makes up about 90% of the universe by weight.

Biology (in humans):

Hydrogen makes up two of the three atoms in water and water is absolutely essential to life.

Geology (in the universe):

Hydrogen is a major component of the planet Jupiter. In the planet's interior the pressure is probably so great that solid molecular hydrogen is converted into solid metallic hydrogen.


Hydrogen gas are flammable and use as medicine and kills germs with Hydrogen peroxide.

Interesting Facts:

It is dangerous to use hydrogen as a gas on the blimps because a spark to make the blimps explodes.

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