hydrogen

水素

記号はH。水など多くの物質に含まれる、最も軽い化学元素。

やさしい英語で： The lightest chemical element, with the symbol H, found in water and many other substances.

• Hydrogen is the lightest element.
• Water contains hydrogen and oxygen.
• Scientists study hydrogen in distant stars.

よく使う表現： hydrogen in water, hydrogen content, hydrogen and oxygen, hydrogen isotope

水素、水素ガス

化学式はH₂。色やにおいがなく、非常に軽くて燃えやすい気体。

やさしい英語で： A very light gas with no color or smell that burns easily and has the formula H₂.

• The tank contains hydrogen.
• Hydrogen burns when mixed with oxygen.
• This rocket uses liquid hydrogen as fuel.

類義語： hydrogen gas

よく使う表現： hydrogen gas, hydrogen fuel, liquid hydrogen, tank of hydrogen

水素原子

記号Hで表される、最も軽い化学元素の一つの原子。

やさしい英語で： One atom of the lightest chemical element, whose symbol is H.

• This carbon has one hydrogen attached.
• The reaction replaces a hydrogen with chlorine.
• Both hydrogens are bonded to the same oxygen.

類義語： hydrogen atom

よく使う表現： attached hydrogen, replace a hydrogen, hydrogen on carbon