Double Replacement Reactions
By Jill Larson
In this interactive object, learners identify charges on ions, write new formulas based on charge, and balance equations using coefficients.
In this interactive and animated object, students distribute the valence electrons in simple covalent molecules with one central atom. Six rules are followed to show the bonding and nonbonding electrons in Lewis dot structures. The process is well illustrated with eight worked examples and two interactive practice problems.