noun🔗Share氢，氢气。 The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.00794."Hydrogen is the simplest chemical element, with only one proton in its atom. "氢是结构最简单的化学元素，它的原子中只有一个质子。elementsubstancechemistryphysicssciencematerialChat with AIVocabulary GamePractice Reading
noun🔗Share氢气，氢。 Molecular hydrogen (H2), a colourless, odourless and flammable gas at room temperature."The scientist carefully collected the hydrogen gas in the lab. "科学家小心地在实验室里收集氢气。elementsubstancechemistrymaterialfuelenergyscienceChat with AIVocabulary GamePractice Reading
noun🔗Share氢，氢原子 An atom of the element."The scientist studied the hydrogen atom in detail. "这位科学家详细研究了氢原子。elementchemistrysubstancescienceChat with AIVocabulary GamePractice Reading
noun🔗Share氢，氢元素。 A sample of the element."The science experiment required a small hydrogen sample for the demonstration. "这次科学实验需要一小份氢元素样品来进行演示。elementsubstancechemistryChat with AIVocabulary GamePractice Reading
