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Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. Hydrogen, with the chemical symbol H, is the chemical element with the atomic number 1. .08988 grams per cubic centimeter. CAS number

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. Number of Electrons.

Relative atomic mass The mass of an atom relative to that of carbon-12. In terms of a sheer number of atoms, about 90% of atoms in the universe are hydrogen. This is approximately the sum of the number of protons and neutrons in the nucleus. 1766 in England and in France.

1.00794 atomic mass units.

Where more than one isotope exists, the value given is the abundance weighted average. Common Compounds. Number of Protons.

Number of Neutrons. 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 Date and Place of Discovery. Henry Cavendish and Antoine-Laurent de Lavoisier.

Hydrochloric acid (HCl)

The atomic number is equal to the number of protons in an atom's nucleus. From the Greek words hudôr, meaning water and gennan, meaning to generate. 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. Because the element is so light, this translates into around 74% of the universe by mass.

Hydrogen's atomic number is 1 because all hydrogen atoms contain exactly one proton. Author: Isotopes Atoms of the same element with different numbers of neutrons. Element atomic number 1 is the most abundant element in the universe. Hydrogen is extremely flammable, but it doesn't burn without the presence of oxygen.

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

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