Under standard conditions, hydrogen is a gas of diatomic molecules with the formula H2, called dihydrogen, or sometimes hydrogen gas, molecular hydrogen, or simply hydrogen. Dihydrogen is …

Jan 16, 2026 · Hydrogen, a colorless, odorless, tasteless, flammable gaseous substance that is the simplest member of the family of chemical elements. The earliest known chemical property of …

Apr 18, 2025 · Hydrogen (H 2), a diatomic molecule consisting of two hydrogen atoms covalently bonded, holds a position of paramount importance in chemistry, physics, and increasingly, in …

Liquid hydrogen (H₂ (l)) represents the cryogenic liquid state of molecular hydrogen, existing below its critical temperature of 33.0 K. This cryogenic fluid exhibits a boiling point of 20.28 K at standard …

Aug 29, 2025 · When two hydrogen atoms approach, their single electrons are shared. This sharing creates a single covalent bond, often represented as H-H, forming the H2 molecule. The shared pair …

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of …

H2 is the chemical formula for the diatomic molecule of hydrogen, which is the simplest and most abundant element in the universe. This term is crucial in understanding the phases and classification …

Definition of hydrogen (H2) the lightest known gas; hydrogen vapors are highly flammable, colorless, odorless, tasteless, and nontoxic. Hydrogen is used as a means of providing a reducing atmosphere, …

Chemical, Physical and Thermal Properties of Hydrogen - H2. Hydrogen, H2, is a colorless, odorless gas. Hydrogen is easily ignited. Once ignited it burns with a pale blue, almost invisible flame. The …

Jan 29, 2026 · Hydrogen water has been said to have potential benefits including antioxidant and anti-inflammatory properties. But is this science-backed? A dietitian shares her thoughts.