PPT-4.3 Atomic Structure

Chemistry Ms Pollock 2013 2014 Introduction Daltons atomic theory very good but not entirely correct Atoms able to be broken into smaller particles Electrons Protons and Neutrons Electrons. At the start of WWII in 1939 the atomic bomb had not yet been invented. However, scientists discovered about that time that a powerful explosion might be possible by splitting an atom. This type of bomb could destroy large cities in a single blast and would change warfare forever!. Lab no. 6. In . analytical chemistry. , . Atomic absorption spectroscopy. (AAS). . is a technique for determining the concentration of a particular metal . element. . (e.g. Fe, Cu, Al, Pb, Ca, Zn). Cryo. -EM. Lindsey . Organtini. 8-16-13. Structure Work Group. Virus assembly. Structure is a key element in understanding viral assembly. X-Ray crystallography can resolve atomic structural information, so why not use it?. Chemistry. Learning Goals . To be able to . explain and draw atomic structure. Elements. Elements are the . building blocks. of all . matter. on Earth. Elements are made up of . atoms. Differences in . Advanced Chemistry. Ms. . Grobsky. Food For Thought. Rutherford’s model became known as the “planetary model”. The “sun” was the positively-charged dense nucleus and the negatively-charged electrons were the “planets”. Chapter 1D. Warm Up November . 28. What is smaller, an atom or a cell? . Name and describe one element that you are familiar with on the periodic table. . When large blooms of algae die, decomposers use all the oxygen in the water to break down the dead algae. What is this a result of? . The lab technician shown here is using a magnifying lens to examine a bacterial culture in a petri dish. When scientists cannot see the details of what they study, they try to obtain experimental data that help fill in the picture.. Pre-AP Chemistry. Charles Page High School. Stephen L. Cotton . Section 4.1 Defining the Atom. OBJECTIVES:. Describe. Democritus’s ideas about atoms.. Section 4.1 Defining the Atom. OBJECTIVES:. Explain. Pre-AP Chemistry. Charles Page High School. Stephen L. Cotton . Section 4.1 Defining the Atom. The Greek philosopher . Democritus. He believed that atoms were . indivisible. . and . indestructible. Dalton’s Atomic Theory. FDR receives a letter from Albert Einstein. Informed FDR of recent developments in splitting uranium atoms. Could lead to “extremely powerful bombs of a new type” by means of nuclear fission. Nucleus absorbs a neutron, breaks into two equal fragments. Matter describes anything that has . mass. and . volume. Can matter be invisible? . YES. Ex. . Air. Matter and Atoms. History of atoms. Democritus. Was a . Greek. philosopher in . 400 BC. Thought the universe was made of . Over the past century scientist have discovered that the atom is composed of 3 subatomic particles:. Protons. Neutrons. Electrons. Checking for understanding. Draw this diagram. Label all subatomic particles and include their charges.. In your notes…. Draw a model of an atom that best represents each component of that atom.. Foundations of Atomic Theory. Particle Theory of Matter. Democritus in 400 B.C.. Stated that nature’s basic particle was the atom (“indivisible” in Greek). . Review. Pollution & Recycling. Projects?. Next Physical Science Class. Jan. 8. th. Finals Class Jan. 15. th. 4 pm. .5 for passing the Final. All Power Points will be on line on my web site. You will be given back your notes, you can use the .