Hydrogen is a chemical element; it has symbol H and atomic number 1. It is the lightest element and, at standard conditions, is a gas of diatomic molecules with the formula H2, sometimes called dihydrogen, [11] hydrogen gas, molecular hydrogen, or simply hydrogen. It is colorless, odorless, [12] non-toxic, and highly combustible.

Molecular hydrogen (H2) is an agent with potential applications in oxidative stress-related and/or inflammatory disorders. H2 is usually administered by inhaling H2-containing air (HCA) or by oral intake of H2-rich water (HRW). Despite mounting evidence, the molecular mechanism underlying the therapeutic effects and the optimal method of H2 ...

2025年1月26日 · Under ordinary conditions, hydrogen gas is a loose aggregation of hydrogen molecules, each consisting of a pair of atoms, a diatomic molecule, H 2. The earliest known important chemical property of hydrogen is that it burns with oxygen to form water , H 2 O; indeed, the name hydrogen is derived from Greek words meaning “maker of water.”

2025年1月21日 · Hydrogen gas (H₂) consists of two hydrogen atoms bonded together. Each hydrogen atom has one proton in its nucleus and one electron. In the hydrogen molecule, the two atoms are bound by a covalent bond, where they share their single electrons.

Hydrogen combines with other elements to form numerous compounds. Some of the common ones are: water (H 2 O), ammonia (NH 3), methane (CH 4), table sugar (C 12 H 22 O 11), hydrogen peroxide (H 2 O 2) and hydrochloric acid (HCl). Hydrogen has three common isotopes. The simplest isotope, called protium, is just ordinary hydrogen.

Hydrogen is a chemical element with the chemical symbol H and molecular formula H2. Visit BYJU'S to understand the properties, structure and uses of hydrogen gas along with illustrations and FAQs.

Element Hydrogen (H), Group 1, Atomic Number 1, s-block, Mass 1.008. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

2023年9月18日 · The H-2 programs allow certain U.S. employers or agents to bring foreign nationals to the United States to fill temporary jobs for which there are not enough U.S. workers who are able, willing, qualified and available to do the temporary work.

2025年1月26日 · Hydrogen - Reactivity, Uses, Properties: One molecule of hydrogen dissociates into two atoms (H2 → 2H) when an energy equal to or greater than the dissociation energy (i.e., the amount of energy required to break the bond that holds together the atoms in …

Hydrogen gas (H2) is a colorless, odorless, and highly flammable gas that is the lightest element in the periodic table. H2 is a diatomic molecule, meaning it consists of two hydrogen atoms bonded together by a covalent bond.