Slide 12.1 Atoms and Their Structure  Democritus – 460 – 370 BC Greek philosophers thought all matter was made up of these 4 ‘elements’: earth, air, fire and water…

Slide 1 Slide 2 Elements, atoms, & the discovery of atomic structure Slide 3 EARLY MODELS OF THE ATOM Chapter 4 Slide 4 What is an atom? yThe smallest particle of an…

3-2 Discovering Atomic Structure* The âHoly Grailâ Of Chemistry: To Understand the Structure of the Atom *Modified from a presentation by Mr. Matt Davis. Sept 2006 OBJECTIVES…

The History of the Atom History of the Atom Timeline Democritus 460 BC and Dalton 1803 AD Thomson 1897 Rutherford 1912 Bohr 1913 Modern Quantum Cloud Model post 1930 Marble…

Greek philosophers (300 BC) proposed matter was made of 4 elements: earth, air, fire, water. Democritus coined the word âatomâ meaning âcannot be broken.â Atom seen as…

Slide 1 Chapter 2: Matter is Made up of Atoms Slide 2 Early Ideas About Matter Greek philosophers (2500 y.a.) proposed matter was made of 4 elements: earth, air, fire, water.…

GUNN DIODE Introduction y Microwave devices that operate by a µ¶transferred electron mechanism ³ are often called Gunn diodes. It is named after J.B.Gunn (1963) who observed…