PPT-Unit 3: Atom

Atomos Not to Be Cut The History of the Atom and the Atomic Theory Atomic Models This model of the atom may look familiar to you This is the Bohr model In this model the nucleus is orbited by electrons which are in different energy levels . Lesson 1: Atomic Structure. Scientist. Contribution to Atomic Theory. Experiment. Atomic Structure. Chemistry 12: Chapter 4. Atomic Structure. You should be able to:. Discuss the development of the atom from earliest atomic theory to modern day theory of the atom. Detailed Study . 3.3. Chapter. 12.1: Splitting the atom – Nuclear Fission. Inside the Nucleus. Uranium, with 92 protons and 140 neutrons, is one of the largest atoms. Even though its nucleus is so large, around 100 000 000 000 of these nuclei would fit, lined up in 1 mm.. Also Known As. Static Electricity. Chemistry Refresher. Atom. the basic unit that makes up all . matter. Made up of protons, neutrons, and electrons. Chemistry Refresher. Proton. Part of an atom that has a positive charge. Bio “Life” . +. . Chemistry “Chemical Reactions”. . =. The study of chemical reactions in living things. . Why Biochemistry?. One characteristic of living things: life depends on . chemical reactions!. Chemical and Physical Changes Lab. Chemistry GT 9/21-22/15. Drill. Look at the line graphed over there . . What property does its slope represent?. Calculate the slope.. HW: . Chem. & . Phys. Electron Pairs. Recall that in the Lewis/electron dot diagram, only valence electrons are shown. We consider the shell that they are in to be the valence shell. . These valence electrons give the element its chemical properties, and therefore determine its ability to form chemical bonds. . Module. Alireza . Etesami. University of Memphis. 2017. Reference: http://www.ide.titech.ac.jp/~takahak/pub/ORAN/EAMlecture.pdf. Initial position and velocities. Potential energy. Lennard-Jones (LJ). https://youtu.be/. hhbqIJZ8wCM. What is an Atom?. The simplest particle of an element that retains its properties.. Who is Democritus?. This Greek philosopher was among the first to suggest the existence of atoms . Chemistry. Basics of the Atom . Subatomic. Particle. Charge. Location in. the Atom. Mass. a.m.u.. : unit used to measure mass of atoms. “atomic mass unit”. proton. neutron. electron. 1 . 0. 1–. Bonding. Door. SMARTBOARD. Door. SMARTBOARD. Go to your ASSIGNED seat!!. Go to your ASSIGNED seat!!. Door. SMARTBOARD. CATALYST. Can two anions form an ionic bond? Why or why not?. *Answer in complete sentences!. -The nucleus is at the centre of the atom and contains the protons and neutrons. Protons and neutrons are collectively known as . nucleons.. The sub-atomic particles:. Protons. are positively charged . Bohr’s Model . Niels. Bohr suggested that the problem about hydrogen spectrum can be solved if we can make some assumptions. . According to classical theory, the frequency of the electromagnetic waves emitted by a revolving electron is equal to the frequency of revolution. . Bond Fission. Alkanes are not particularly reactive due to the non-polar nature of their bonds.. They can, however, react with halogens in the presence of sunlight or UV light where halogenoalkanes are produced along with steamy fumes of the corresponding hydrogen halide.. Rutherford proposed that most of the mass of the atom was concentrated. . at the atom’s center. . Rutherford’s Model of the Atom. Rutherford’s experiment suggested that an atom’s positive charge is concentrated in the center of the atom .