CHEM 11 Lecture Notes - Lecture 6: Ionic Compound, Ionic Bonding, Electron Affinity
13 Oct 2016
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Document Summary
Ionization energy is the energy required to remove one electron from a single atom in the gaseous state. Small values indicate ease of losing electrons to form cations: electron affinity is the energy released on adding an electron to a single atom in the gaseous state. Once the ions are identified, decide how many ions of each type gie a total charge of 0. If the ions are of the same charge, only one of each is needed. If they have different charges, unequal numbers of anions and cations must combine to have a net charge of zero. Really exists in a matrix, not the singular state, but this is easier to write: once the numbers and kinds of ions in the compound are known, the formula is written with the following rules. List cation first and anion second (with a space between the words when written out) Don"t write the charges of the ions (neutral)
