Hydrochloric acid (HCl) Because the element is so light, this translates into around 74% of the universe by mass. .08988 grams per cubic centimeter. Henry Cavendish and Antoine-Laurent de Lavoisier. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Isotopes Atoms of the same element with different numbers of neutrons.

1.00794 atomic mass units.

In terms of a sheer number of atoms, about 90% of atoms in the universe are hydrogen. Number of Electrons.

Number of Neutrons. Relative atomic mass The mass of an atom relative to that of carbon-12. Date and Place of Discovery. From the Greek words hudôr, meaning water and gennan, meaning to generate. Author: Number of Protons. With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table.Hydrogen is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.

CAS number Where more than one isotope exists, the value given is the abundance weighted average. Hydrogen is extremely flammable, but it doesn't burn without the presence of oxygen. This is approximately the sum of the number of protons and neutrons in the nucleus. Hydrogen is the chemical element with the symbol H and atomic number 1. Common Compounds. The atomic number is equal to the number of protons in an atom's nucleus. 1766 in England and in France.

Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure.The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Hydrogen's atomic number is 1 because all hydrogen atoms contain exactly one proton.

Hydrogen, with the chemical symbol H, is the chemical element with the atomic number 1.

Name: Hydrogen Symbol: H Atomic Number: 1 Atomic Mass: 1.00794 amu Melting Point:-259.14 °C (14.009985 K, -434.45203 °F) Boiling Point:-252.87 °C (20.280005 K, -423.166 °F) Number of Protons/Electrons: 1 Number of Neutrons: 0 Classification: Non-metal Crystal Structure: Hexagonal Density @ 293 K: 0.08988 g/cm 3 Color: colorless Atomic Structure

Element atomic number 1 is the most abundant element in the universe.