Atomic Structure – The Nucleus! The Important Idea Matter is discontinuous – it cannot be subdivided infinitely. Credited to Democritus of Abdera (ca. 400 BC) – matter…

The Development of Atomic Theory I. Early Models of Atomic Structure The work of Dalton, Thomson, and Rutherford… Democritus, "The Laughing Philosopher" Democritus…

Atomic Structure Chapter 4, Section 1 Atomic History In the fourth century BC, the Greek philosopher Democritus suggested that the universe was made of invisible units called…

AS Chemistry AS Chemistry Revising Atoms Learning Objectives Candidates should be able to: Identify and describe protons, neutrons and electrons in terms of their relative…

Ernest Rutherford & the Gold Foil Experiment Ernest Rutherford & the Gold Foil Experiment By Jake Easton & James Lampmann Birth He was born on August 30, 1871…

AS Chemistry AS Chemistry Revising Atoms Learning Objectives Candidates should be able to: Identify and describe protons, neutrons and electrons in terms of their relative…

Ernest Rutherford & the Gold Foil Experiment Ernest Rutherford & the Gold Foil Experiment By Jake Easton & James Lampmann Birth He was born on August 30, 1871…

Chapter Electrons in the Atom Timeline of the Models* ? *There are many more models. These are the ones we’ll cover in class. 460 BC Democritus “Atoms” 1800 John Dalton…

The Evolution of Early Atomic Models Early Models of Atomic Structure The work of Thomson, Rutherford and Bohr… Thomson’s Model Discovered the electron while studying…