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.
Some chemical/physical properties of ammonia are: 1  At room temperature, ammonia is a colorless, highly irritating gas with a pungent, suffocating odor. 2  In pure form, it is known as anhydrous ammonia and is hygroscopic (readily absorbs moisture). 3  Ammonia has alkaline properties and is corrosive. copy of the The Facts About Ammonia (Technical Information) is available in Adobe Portable Document Format (PDF, 63 KB, 3pg.). Note to reader: This fact sheet is intended to provide general awareness and education on a specific chemical agent.