Kathy Erhardt

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The History of the Atom – Theories and Models

All matter is made up of atoms. This is something we now take as a given, and one of the things you learn right back at the beginning of high school …


History of the Atom (Atomic Theory)

The History of Atomic Chemistry: Crash Course Chemistry #37

CK-12 Foundation

Atomic Shorthand

Atomic Shorthand<p>Introduction<p>We have already seen how we can show how electrons are arranged in atoms using a type of shorthand. The electronic …


Inside the Atom

Inside the Atom<p>Introduction<p>You've probably heard the words 'proton', 'neutron', and 'electron' before, but do you know what they are? In this unit we …


History of the Atom

History of the Atom<p>Introduction<p>Our understanding of the physical world has grown at an incredible rate in the last 200 years. The key to the advances …