SOLAR SYSTEM

Detailed explanation-1: -Hydrogen which is highly enriched in deuterium is present in organic matter in a variety of meteorites including non-carbonaceous chondrites. The concentrations of this hydrogen are quite large.

Detailed explanation-2: -Hydrogen is easily the most abundant element in the universe. It is found in the sun and most of the stars, and the planet Jupiter is composed mostly of hydrogen. On Earth, hydrogen is found in the greatest quantities as water.

Detailed explanation-3: -Here on earth, vast numbers of hydrogen atoms are contained in water, plants, animals and, of course, humans. But while it’s present in nearly all molecules in living things, it’s very scarce as a gas – less than one part per million by volume.

Detailed explanation-4: -Stony meteorites are by far the most common. More than 95% of meteorites observed to fall to Earth are stony. They can be divided into chondrites and achondrites. Both types are composed mostly of silicate minerals, but the great majority also contain metallic iron in small-scattered grains.

Detailed explanation-5: -Hydrogen has one proton, one electron and is the only element with no neutrons, making it the simplest element in the universe. Because of this, Hydrogen is believed to be the most abundant element, accounting for about 90% of the visible universe.