French Revolution Timeline May 5, 1789 A meeting of the Estates-General is called by Louis XVI in Versailles to discuss and approve a new tax plan. June 17, 1789 Three Poitevin cures decide to join the Third Estate, leaving the Chambers of the Clergy.
Helium is a chemical element with symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among all the elements.
Chemical Properties. Oxygen is a highly reactive element, highly paramagnetic, and is easily capable of combining with other elements. One of oxygen's most important chemical properties is that it supports combustion (see picture to the right).Oxygen also combines with elements at room temperature, for example, the formation of rust.Decaying is an example of oxygen reacting with compounds.Carbon dioxide and water are the main products of decay.ne of oxygen's most important chemical properties is that it supports combustion (see picture to the right). Oxygen also combines with elements at room temperature, for example, the formation of rust.