Deuterium vs. Hydrogen

Deuteriumnoun

(isotope) An isotope of hydrogen formed of one proton and one neutron in each atom - H.

Deuteriumnoun

An atom of this isotope.

Deuteriumnoun

an isotope of hydrogen which has one neutron (as opposed to zero neutrons in hydrogen)

Deuterium

Deuterium (or hydrogen-2, symbol 2H or D, also known as heavy hydrogen) is one of two stable isotopes of hydrogen (the other being protium, or hydrogen-1). The nucleus of a deuterium atom, called a deuteron, contains one proton and one neutron, whereas the far more common protium has no neutrons in the nucleus.

Hydrogennoun

The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.00794.

Hydrogennoun

Molecular hydrogen (H2), a colourless, odourless and flammable gas at room temperature.

Hydrogennoun

An atom of the element.

Hydrogennoun

A sample of the element.

Hydrogennoun

A gaseous element, colorless, tasteless, and odorless, the lightest known substance, being fourteen and a half times lighter than air (hence its use in filling balloons), and over eleven thousand times lighter than water. It is very abundant, being an ingredient of water and of many other substances, especially those of animal or vegetable origin. It may by produced in many ways, but is chiefly obtained by the action of acids (as sulphuric) on metals, as zinc, iron, etc. It is very inflammable, and is an ingredient of coal gas and water gas. It is standard of chemical equivalents or combining weights, and also of valence, being the typical monad. Symbol H. Atomic weight 1.

Hydrogennoun

a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe

Hydrogen

Hydrogen is the chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element in the periodic table.