Hydrogen - Wikipedia
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 H 2, sometimes called dihydrogen, [11] but more commonly called hydrogen gas, molecular hydrogen or …
氢气 - 百度百科
氢气（Hydrogen）是 氢 元素形成的一种单质，化学式H 2 ，分子量为2.01588。常温常压下，氢气是一种无色、无味、无臭、无毒、极易燃烧且难溶于水的气体。
氢 - 维基百科，自由的百科全书
氫 （英語： Hydrogen），是一種 化學元素， 化學符號 为 H， 原子序數 为1， 原子量 為 1.007 94 u 是 元素週期表 中最輕的元素。 單原子氫 （H）是宇宙中 最常見 的 化學物質，佔 重子 總質量的75% [8][註 1]。 等離子 態的氫是 主序星 的主要成份。 氫的最常見 同位素 是「氕」（此名稱甚少使用，符號為 ），含1個 質子，不含 中子；天然氫還含極少量的同位素「氘」（ 或 ），其含1個質子和1個中子。 氫原子最早在宇宙 復合 階段出現並遍佈全宇宙。 在 標準溫度和壓力 之 …
氫氣 - 维基百科，自由的百科全书
氢气是氢元素标准状况下以气态形式存在的物质，化学式为h 2 ，由两个氢原子构成，又称分子氢。 氢气是最轻的气体，可用于 氣球 填充中，但后来因其浮力而使用的氢气被逐渐替换为危险性较小的不可燃气体氦气。
Hydrogen | H2 | CID 783 - PubChem
Molecular hydrogen (H2) is a potent free radical scavenger that not only ameliorates oxidative stress but also lowers cytokine levels. The aim of the present study was to investigate the protective effects of H2 gas on AP both in vitro and in vivo.
Hydrogen | Properties, Uses, & Facts | Britannica
2024年10月30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.”
Hydrogen Gas (H2) - Structure, Properties and Uses - BYJU'S
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.
Hydrogen (H) - Definition, Preparation, Properties, Uses, …
2024年9月3日 · We write H2 instead of H because hydrogen naturally exists as a diatomic molecule, meaning two hydrogen atoms bond together to form H2, the most stable form of hydrogen gas. Is hydrogen H+ or H? Hydrogen can exist as H (a neutral atom) or H+ (a proton).
Hydrogen - Element information, properties and uses | Periodic …
Element Hydrogen (H), Group 1, Atomic Number 1, s-block, Mass 1.008. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
Hydrogen - Thermophysical Properties - The Engineering ToolBox
Online calculator, figures and tables showing density and specific weight of hydrogen, H2, at temperatures ranging from -260 to 325 °C (-435 to 620 °F) at atmospheric and higher pressure - Imperial and SI Units.