CHAPTER 18 ATOMS AND ELEMENTS Section 18.1 Atomic Structure.
Electrons in Atoms. Models of the Atom OBJECTIVE: l Summarize the development of atomic theory.
Ch. 2 Atoms Chemistry II Milbank High School. Ch. 2.1-3 Dalton’s Atomic Theory The Nuclear Atom Isotopes, Atomic Masses, and Nuclear Symbols.
Chapter 5 The Electron Cloud. Dalton’s Model Thomson’s Plum – Pudding Model positive sphere (pudding) with negative electrons (plums) dispersed throughout.
Atomic Physics. Atomic structure discovered Ancient Greeks Democritus (460-362 BC) - indivisible particles called “atoms” Prevailing argument (Plato and.
Atomic Theory 1 Democritus to the Planetary Model.
Atomic Spectra and Atomic Energy States Reminder: A.S. 13.1.5-13.1.7 due Monday 3/23/15 A.S. 13.1.8-13.1.13 due Tuesday 3/24/15 WebAssign Quantum #3 due.
