Physical and Chemical Properties
The chemical properties of an element are due to the distribution of electrons around the atom's nucleus, particularly the outer, or valence, electrons; it is these electrons that are involved in chemical reactions. Physical properties can be observed or measured without changing the composition of matter. Physical properties are used to observe and describe matter. Physical properties include: appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity, and many others. Radon is a colorless, odorless gas with a boiling point of -61.8 degrees celsius. Its density is 9.73 grams per liter, making it about seven times as dense as air. It is the densest gas known. Furthermore, radon has a melting point of -71 degrees celsius. The heaviest gas on the periodic table happens to be Radon. Also this element is colorless, for it’s a gas, and a brilliant phosphorus. Below radons boiling point when dissolved into water it becomes a clear and colorless liquid. Liquid radon tends to freeze at an even lower temperature. When it is in the state of a solid, its color changes from yellow to orangish-red as the temperature lowers even further. Also radon glows because of the intense radiation being produced.