Curated Video
Valence Electrons & Lewis Dot Diagrams - what are they and how do I draw them?
Valence electrons are the electrons in the outermost energy level of an atom. They are important because they are involved in the chemical bonding of our elements which helps determine the reactivity of elements. In order to be stable,...
Schooling Online
Chemistry Properties and Structure of Matter: Properties of Matter - Naming Allotropes
This lesson will present the rules for writing the names and chemical formulae of elements and their allotropes.
Definitions included: chemical structure, ionic lattice, metallic lattice, molecule, covalent network, solitary atom,...
TMW Media
Atomic Number, Mass Number & Isotopes Part 2
This program covers the very important topics known as atomic number, mass number, and isotopes. We begin by discussing the structure of the atom and how the atomic number is used to organize the periodic table. We discuss the mass...
Schooling Online
Chemistry Properties and Structure of Matter: Properties of Matter - Naming Monoatomic Ions
This lesson will introduce the rules for writing the names and chemical formulae of non-metal anions and metal cations, including metals with multiple positive oxidation states.
Definitions included: compound, cation, anion, IUPAC,...