Just the facts:

Hydrogen Definition & Meaning - Merriam-Webster

At first you had me confused, since the banner read hyrdogen, not hydrogen, but I believe through our years in school that we're all well aware about the  properties and uses of hydrogen.  

5 hours ago, JamesSavik said:

Hydrogen sits at the top of the periodic table as the lightest and simplest element with one proton, neutron and electron (typically).

 

I'm always nervous when correcting Fearless Leader, but the most common and actually lightest, simplest isotope of Hydrogen (protium) contains one proton and one electron. The second isotope, Deuterium, contains a proton, electron and one neutron. Water containing Deuterium is called heavy water and was the basis of the 1965 movie The Heroes of Telemark. The third isotope Tritium contains two neutrons and is radioactive with a half-life of 12.32 years.

17 minutes ago, CarlHoliday said:

I'm always nervous when correcting Fearless Leader, but the most common and actually lightest, simplest isotope of Hydrogen (protium) contains one proton and one electron. The second isotope, Deuterium, contains a proton, electron and one neutron. Water containing Deuterium is called heavy water and was the basis of the 1965 movie The Heroes of Telemark. The third isotope Tritium contains two neutrons and is radioactive with a half-life of 12.32 years.

I was wrong. Alpha particles are stripped Helium nuclei. Doh!