氢(氫)qīng气体元素,符号H(hydrogenium)。无色无臭无味,是元素中最轻的。氢的同位素有氕、氘、氚三种。在工业上用途很广。{hydrogen (H); gaseous element, colourless, odourless and tasteless, the lightest of all elements, having three isotopes: protium, deuterium, and tritium, widely used in industry;}通称{generally called}氢气{qīngqì}。