CHEM 130 Lecture Notes - Lecture 24: Lead, Covalent Bond, Ionic Radius

• School: U of M
• Department: Chemistry
• Course: CHEM 130
• Professor: Jadwiga Sipowska

Document Summary

Chem 130: general chemistry: macroscopic investigations and reaction principles - A chemical bond formed by the electrostatic attraction between positive and negative ions. Forms when one or more electrons are transferred from the valence shell of one atom to the valence shell of the other. The atom that loses electrons becomes a cation (positive ion) and the atom that gains becomes an anion (negative ion) Forms when large numbers of ions gather together. Normally has a regular, crystalline structure that allows for the maximum attraction of ions, given their particular sizes. A symbol in which the electrons in the valence shell of an atom or ion are represented by dots placed around the letter symbol of the element. Dots are placed one to each side of a letter symbol until all four sides are occupied. Then the dots are written two to a side until all valence electrons are accounted for. The exact placement of the single dots is immaterial.