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 are the characteristics of a substance that determine how it will react with other substances. Chemical properties is a characteristic of pure substance â¦ s that describes it's ability to change into different substances.he chemical property of a given element refers to the property that is used to characterize the reaction of the materials hence their identity.