A gaseous element, colorless, odorless, tasteless, flammable, and lighter than any other isolated element. Its symbol is H, and in conjunction with carbon it forms many long series of compounds which are the most important constituents of petroleum.
A gaseous element, colorless, odorless, tasteless, flammable, and lighter than any other isolated element. Its symbol is H, and in conjunction with carbon it forms many long series of compounds which are the most important constituents of petroleum.
