Unit Three Elements and the Periodic Table Ca B Be Zn Ti Au.
Atomic Structure. Scientific Modeling A.Scientists develop models to explain things they cannot directly observe.
Introduction X-rays are a part of electromagnetic spectrum. X-rays have a wavelength in ranges of 0.01nm to 10nm.70-200pm for (AP). Produced by the deceleration.
Chapter 5 Central Axis Depth Dose Calculations. 2 Definition of Beam Geometry The accurate delivery of a radiation dose to patient depends on the precise.
Unit 1 AQA. 1.Atomic structureAtomic structure 2.Amount of substanceAmount of substance 3.BondingBonding 4.PeriodicityPeriodicity 5.Introduction to organic.
Atomic Theory. Democritus – 460 – 370 BC Matter consisted of tiny particles “atomos” Ideas were wrong.
CHAPTER 4 ATOMIC STRUCTURE. STUDYING ATOMS 4.1 ANCIENT GREEK MODELS OF ATOMS Democritus Believed that all matter was made of small particles that could.
Structure of Atom
Technology for a “New Seeing”. Scuola Normale Superiore - Pisa “As humankind capabilities progress, we just need to redefine what we mean by the the world.
II. History of atomic structure A. Democritus – 500 BCE Theorized that matter is composed of small, indivisible particles = ATOMOS (Greek for indivisible)
MIRAGES Mirages are actually optical illusions They are usually seen on a very hot day and are a result of how light travels through air at different temperatures.
Chemistry AI Chapter 4 A. Atom (Section 4.1) 1. Democritus (460B.C.-370B.C.) The smallest part of an element that retains its identity during a chemical.