Hydrogen

The first element on the Periodic Table of Elements is Hydrogen.

What is Hydrogen?

*Hydrogen is considered a non-metal. It is usually found as a gas.

*Hydrogen's atomic makeup consists of one proton and one electron. This makes hydrogen light in weight. It is lighter than air.

*Hydrogen is one of the most abundant elements in the universe. Some of the common compounds that it is in are:

            H₂O: Water. This contains two hydrogen atoms and one oxygen atom. 

           NH₄: Ammonia. Contains one nitrogen atom and four hydrogen atoms.

           CH₄: Methane. Contains one carbon atom and four hydrogen atoms.

*Symbol: H

*Atomic number: 1

*Atomic mass: 1.00794

Where is Hydrogen on the Table?

It is the red box in the top left corner. It has Hydrogen's symbol on it.