CH 110 Lecture Notes - Lecture 9: Periodic Trends, Electron Configuration, Ionic Radius
8 Jan 2017
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Document Summary
Chapter 7 part i: periodic properties of the elements. How we organize and recall chemical facts. The periodic nature of the periodic table arises from repeating patterns in the electron configuration of the elements. These trends within a row or column help us to make predictions on the chemical properties and reactivity. The discovery of chemical elements has been ongoing since ancient time s. The majority of element readily form compounds and therefore are not found in nature in their elemental form. During the 1800s advances in chemistry made it easier to isolate elements from their compounds. Davy using a voltaic battery to pass electricity through molten salts of alkali metals. This produced highly reactive metals at the negative electrode; was able to obtain sodium, potassium, magnesium, calcium, barium, and strontium. Periodicity- repetitive pattern of a property for elements based on atomic number.
