This page will introduce or help refresh your knowledge on the atoms and elements of chemistry.
The videos to the right will explore atomic theory, structure of an atom, calculating atomic number/mass/structure, and the periodic table of elements and its trends. Be sure to view all videos.
Additional links to external resources appear below.
In this video we will learn about the development of modern atomic theory. We will talk about the contributions of Democritus, John Dalton, JJ Thomson, Ernest Rutherford, Niels Bohr, Werner Heisenberg, and Erwin Schrodinger and a few of the important experiments that lead to our current understanding of the model of the atom.
Protons, neutrons and electrons are described in terms of their location, charge and mass. Element symbol notation is also explained as a way to represent atoms of an element.
Atoms, atomic structures, protons, ions, neutrons, learn what all these words mean! This video explains how to make sense of chemical symbols and the periodic table. Finally you will be able to calculate protons, electrons and neutrons of an element, just in time to ace that quiz!
A brief introduction to the periodic table of elements.
Why is the periodic table arranged the way it is? There are specific reasons, you know. Because of the way we organize the elements, there are special patterns that emerge.
In this video Paul Andersen defines and explains the importance of the mole. The mole is simply a number (like a dozen) used to express the massive number of atoms in matter. It serves as a bridge between the mass of a compound and the number of particles. It is represented in chemical reactions as the coefficients before reactants and products.
