Colourless, odourless, lighter-than-air gas. The most common chemical element in the universe.
A compound ion formed when a water molecule releases a proton.
A colourless, odourless gas, an important component of the atmosphere, indispensable to sustain terrestrial life.
Water is a very stable compound of hydrogen and oxygen, vital for all known forms of life. In nature it occurs in liquid, solid and gaseous state.
This animation demonstrates the structure and operation of hair dryers.
Knallgas is the mixture of hydrogen and oxygen. It will explode when ignited.