PPT-How is radioactivity related to atomic structure?

Following the discovery of radioactivity by Henri Becquerel in 1896 many scientists were keen to find out more about it and understand where it came from In a radioactive atom the nucleus is unstable and so it emits particles or waves of radiation to form a more stable atom . For . B.Sc. Chemistry (General), Part- I. By. Dr. . Kakoli. . Banerjee. Department of Chemistry. Aims and Objectives. Definition of Radioactivity . Discovery of Radioactivity- The Pioneers. Cause of Radioactivity- Nuclear Instability. Pierre Curie was already a famous scientist before he married Marie Sklodowska in 1895.  This famous couple did not only find true love, they also discovered radium and polonium.  For their groundbreaking research in radioactivity, the couple were awarded the 1903 Nobel Prize in physics.  It was Marie Curie who coined the term "radioactivity", and in her honor, the 1910 Radiology Congress chose the curie as the basic unit of radioactivity.  Pierre died from being run over by a horse drawn wagon, but Marie continued their research, and was eventually awarded a second Nobel Prize, the 1911 prize for Chemistry.  She died in 1934, suffering from pernicious anemia which had undoubtedly been the result of years of radiation exposure.. Their Effect on Health, The Energy Field. and The Immune System. Dr. Donna M. Starita, DVM, Medical Intuitive. … And Effective Ways To Protect Yourself. Electromagnetism: The Phenomenon Associated With Electricity and Magnetism And Their Interactions With Each Other. Textbook Pages 4-5. Lesson Objectives. Appreciate that there are various models to illustrate atomic structure. Know that early models of atomic structure predicted that atoms and ions with noble gas electron arrangements should be stable. http://www.npl.co.uk/educate-explore/factsheets/ionising-radiation/. We’re surrounded by radioactivity everyday.. Some sources are natural and some sources are anthropogenic (human made.). We’re going to investigate some sources of natural radioactivity found in the environment.. radiation … radioactive material. What are they? . exposure … contamination. Are they the same?. Radioactivity. Spontaneous emission of radiation from the nucleus of an unstable isotope. Disintegration Decay. Ar. cluster ions – an . ab initio . study. 5-th School-Conference on Atomistic Simulation of Functional Materials. J.G. . Korobova. , . A.E . Ieshkin, . V.. S. . Chernysh. Moscow . State University, Physical Department. Week beginning 14. th. November 2016. Important discoveries. The Polish scientist, Marie Curie, and her. husband (Pierre) discovered 2 new elements. which they called “polonium” and. “radium”. The elements were radioactive. 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 . Joseph T. Hodges. , Adam J. Fleisher, Qingnan Liu, Abneesh Srivastava and David A. Long. Chemical Sciences Division. National Institute of Standards and Technology . Gaithersburg, MD. joseph.hodges@nist.gov. nEXO. collaboration. The University of Alabama. Radon daughter plate-out . as a background source in nEXO. Motivation: Radon daughter background. Radon daughters can deposit on the nEXO detector surfaces while they are exposed to air:. measurements for decommissioning facilities P Fichet (1), C Mougel (1), I Desnoyers (2), P Sardini (3), H Word (4) (1) Den – Service d’Etudes Analytiques et de Réactivité des Surfaces (SEAR 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 .