GACE Special Education Math and Science Study guides, Class notes & Summaries

GACE Special Education Math and Science Rated A+ Anion A negatively charged ion. It is formed by adding electrons to atoms or molecules. Cation A positively charged ion that is formed by removal of electrons from atoms or molecules. Ionic Crystal A crystal that is made up of two or more elements. The positive and negative ions are arranged in a definitive pattern. They are held together by electrostatic attraction. Some examples include sodium chloride and cesium chloride. Latt...