Hydrogen (#1, H)
Hydrogen has an Atomic Radius of 53 pm, Ionization Energy of 13.5984 ev, and an Electronegativity of 2.20 on the Pauling Scale.
Hydrogen Uses and Abundance
Hydrogen is used for many things such as in the production of Methanol, and in the hydration of fats and oils. Compounds that contain this element are: water (H2O), ammonia (NH3), and hydrogen peroxide (H2O2). Hydrogen can be isolated by reacting super-heated steam with carbon or methane.
Hydrogen is extremely cheap at $0.00012 per 1 mg so about $12 for every 1000 mg. Some interesting facts are that it is highly flammable, it is the lightest element, and becomes a liquid when put under extreme pressure.