4CHM11509 HIK and students (1)

4CHM11509 HIK and students (1) - CHM 115 Dr Hilkka Kenttmaa...

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CHM 115 Dr. Hilkka Kenttämaa Lecture 4 Reading was: Chapter 23.1-23.9 – nuclear chemistry Lecture 5: Sections 23.4-23.5 Lecture 6: Sections 23.7-23.9
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Homework Assignments in OWL  Are due on Wednesdays 9 days after the  assignment was given  Each assignment consists of several questions  You have five trials on each question  Just looking at the questions, without any  attempt to answer, will cost you one trial 2
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Nuclear Chemistry Energy Use by Source
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Nucleus Electrons, e (negative charge) Structure of the Neutral Atom Nuclear chemistry involves changes in the nucleus
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Buddy Question # 1 How many neutrons are in a 19 F nucleus? (answer with a number) 9 Mass number = # of protons + # of neutrons Symbol of the element Atomic number = # of protons 19 F 9
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Terminology in Nuclear Chemistry Nucleus - Atomic Nucleus Nucleons - Constituent particles of a Nucleus (Neutrons and Protons) Isotopes - Same number of protons but different number of neutrons Hydrogen: Proton 1 H Deuteron 2 H Tritium 3 H 1 1 1 Which one has two neutrons?
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Radioactivity: the spontaneous emission of energy and particles from atomic nucleii Marie Sklodowska Curie (1867-1934). When M. Curie presented her doctoral thesis, it was described as the greatest single contribution of any doctoral thesis in the history of science. Among other things, two new elements, polonium and radium, had been discovered. In 1903 Becquerel, M. Curie, and her husband, Pierre, were jointly awarded the Nobel Prize in physics. In 1911, M. Curie won a second Nobel Prize, this time in chemistry.
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Natural Types of Radioactive Decay a helium nucleus , an electron ,
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4CHM11509 HIK and students (1) - CHM 115 Dr Hilkka Kenttmaa...

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