Stars, including the Sun, mainly consist of hydrogen in a plasma state, while on Earth, hydrogen is found as the gas H2 (dihydrogen) and in molecules, such as in water and organic compounds. …

Oct 17, 2025 · The earliest known chemical property of hydrogen is that it burns with oxygen to form water; indeed, the name hydrogen is derived from Greek words meaning ‘maker of water.’

Hydrogen CAS登录号 1333-74-0 EINECS登录号 215-605-7 熔 点 -259.23 ℃ [7] 沸 点 -253.77 ℃ [7] 水溶性 0.00017 g / 100mL 密 度 0.07 g/cm³ [3]（-252℃） 外 观 无色无味气体 应 用 肥料生 …

5 days ago · Although hydrogen constitutes nearly 75% of all the universe’s matter, only a small fraction of the hydrogen accessible on Earth exists in a pure state (not bonded to other …

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 occurs naturally on earth in compound form with other elements in liquids, gases, or solids. Hydrogen combined with oxygen is water (H 2 O). Hydrogen combined with carbon …

Hydrogen is one of the three most abundant elements present on Earth. It was discovered in 1766 by Henry Cavendish and is widely used for various industrial, medical and recreational purposes.

Hydrogen, bearing the atomic number 1, is the simplest, lightest, and most abundant chemical element in the universe. Its ubiquity and versatile properties make it vital for a wide range of …

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。 氢气也曾用于肉制品的保鲜。 氢气的英语hydrogen来自希腊语的 ὕδωρ …

hydrogen, Lightest chemical element, chemical symbol H, atomic number 1. A colourless, odourless, tasteless, flammable gas, it occurs as the diatomic molecule H 2.