For a two element ionic compound, the naming is simple. The first part of the name is the name of the metal element. The second part is the name of the nonmetal element, with the suffix â-ide.â. 1  Example: Al 2 O 3.
Exploration & Excavation in Chaco Canyon. It's believed that the first Europeans to see Chaco Canyon came in the 17th Century, when Spanish soldiers engaged in military actions against the Navajos first entered the Chaco area.
A history professor with a love of food shares the best explanation on the subject; he says the taco was likely born from necessity in the 1800s by poor silver miners, and spent the next 100 years spreading through tiny towns and street food stalls throughout Mexico.