In this interactive object, the learner practices identifying charges on ions.

Learners examine the method used to calculate the mass percent of an element in a compound. Three examples and one problem illustrate the method.

Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).

Learners examine how five or six groups of electrons around a central atom cause the shape of the molecule to be trigonal bipyramidal, seesaw, T-shaped, linear, octahedral, square pyramidal, or square planar. Seven examples and three interactive questions are provided in this animated activity.

Find the correct words that go with each definition

You'll identify the geometric characteristic based on its geometric symbol.

A game to help you review for Biology Chapter 2 Test

Strength of Materials