| Plus, xenon happens to be a noble gas, which means it won't corrode or otherwise interact chemically with anything. |
| In deep space, the propellant can be small amounts of ionized xenon gas, accelerated to enormous speeds within a new kind of engine. |
| The momentary high voltage on the metal plate provides the necessary energy to ionize the xenon gas, making the gas conductive. |
| In the early 1960s, a number of chemists found ways of making compounds of some noble gases, including radon, xenon, and krypton. |
| They attributed those lines to the presence of three new elements, which they named neon, krypton, and xenon. |
| A cathode emits a stream of electrons that collides with neutral atoms of xenon, a gaseous element, in a chamber. |
