1. Atomic Structure Early Atomic TheoryDemocritus (400 BC) suggested that the world was made of 2 thing empty space and tiny, invisible particles calledatoms . 2. Aristotle…

Unit: Atomic Structure History of the Atom Important Experiments Leading to Atomic Theory Democritus (400 B.C.) A Greek philosopher Was the first person to think about an…

Atomic Theory Democritus – 460 – 370 BC Matter consisted of tiny particles “atomos” Ideas were wrong John Dalton (1803) Dalton’s Theory – Explains the Law of…

Do now Work silently. Raise hand to ask Ms. Hughes anything. What is an atom? Describe Democritusâs atomic model. Announcements Unit 3 test next Friday If you have not taken…

Introductory Overview Copyright © Myung-Hoon Kim PowerPoint Lecture Presentation by Myung-Hoon Kim, GPC Why Carbon was Chosen for Organisms by Mother Nature? Copyright ©…

The Atom Two major parts of an atom Nucleus (not to scale) Electron Cloud Three Major Sub-Atomic Particles Protons Neutrons Electrons THE PROTON Heavy = 1 amu Positive +…

Atoms and Elements Mr. Matthew Totaro Legacy High School Honors Chemistry Experiencing Atoms Atoms are incredibly small, yet they compose everything. Atoms are the pieces…

Chapter 11 Introduction to Atoms Section 1: Objectives Describe some of the experiments that led to the current atomic theory. Compare the different models of the atom. Explain…

The Periodic Table 1868 Was organized according to the properties of the known elements Dmitri Mendeleev noticed that when the elements were put into order by their atomic…

Slide 1 How do we know about atoms? Atomic Theory Democritus (460 BC- 370 BC) His mentor Leucippus Everything is composed of âatomsâ Atoms are physically indivisible Between…