Atoms and Molecules Micron Foundation K-12 Program August 18, 2015 ©2012 Micron Foundation, Inc. | 1 What is Everything made of? Atoms and Molecules August 18, 2015 ©2012 Micron Foundation, Inc. | 2 Democritus Democritus, 460 – 370 B.C. “Atom” means “uncuttable” August 18, 2015 ©2012 Micron Foundation, Inc. | 3 Atom Models Nucleus - Protons + + Electrons - Neutrons Bohr (planetary) model of the atom August 18, 2015 3-D model of an atom ©2012 Micron Foundation, Inc. | 4 August 18, 2015 ©2012 Micron Foundation, Inc. | 5 Sodium Atomic Number Atomic Symbol 11 Na Na Name Sodium Sodium 22.99 (23) Atomic Mass 22.99 (23) Atomic Number = Number of Protons = 11 Atomic Mass – Atomic Number = Number of Neutrons 23 - 11 = 12 Number of Protons = Number of Electrons = 11 August 18, 2015 ©2012 Micron Foundation, Inc. | 6 Atoms – Molecules - Matter Atoms Molecules Matter August 18, 2015 ©2012 Micron Foundation, Inc. | 7 Single Element Molecules Some molecules are made up of atoms of the same element H2 Hydrogen O2 Oxygen N2 Nitrogen August 18, 2015 ©2012 Micron Foundation, Inc. | 8 Compounds Molecules made up of two or more elements are called Compounds H 2O Water CH4 Methane NaCl Sodium Chloride CO2 Carbon Dioxide August 18, 2015 NH3 Ammonia ©2012 Micron Foundation, Inc. | 9 Activity Stations Atoms Molecules August 18, 2015 ©2012 Micron Foundation, Inc. | 10 Ions & Isotopes Ions Isotopes Atoms with “missing” or “extra” electrons. Variants of an element with a different number of neutrons. Li Be Lithium atom 3 protons 4 neutrons 3 electrons Beryllium atom 4 protons 5 neutrons 4 electrons Be10 Li+ Lithium ion 3 protons 4 neutrons 2 electrons August 18, 2015 Beryllium isotope 4 protons 6 neutrons 4 electrons ©2012 Micron Foundation, Inc. | 11 Periodic Table – Periods 1 Periods 2 3 4 5 6 7 August 18, 2015 ©2012 Micron Foundation, Inc. | 12 Orbital Shells & Periods August 18, 2015 ©2012 Micron Foundation, Inc. | 13 Periodic Table – Groups a 1 I VIII a III IV V II Periods 2 VI VII 3 4 5 6 7 August 18, 2015 ©2012 Micron Foundation, Inc. | 14 Valence Electrons August 18, 2015 ©2012 Micron Foundation, Inc. | 15 Cool Videos “A Boy and His Atom” World’s Smallest Movie + Making of the Video https://www.youtube.com/watch?v=LBpu4OPw6bM Music Videos about Elements Meet the Elements: https://www.youtube.com/watch?v=Uy0m7jnyv6U Elements Song with Periodic Table: http://www.youtube.com/watch?v=zGM-wSKFBpo&feature=related Picture of an Electron http://www.youtube.com/watch?v=ofp-OHIq6Wo&feature=related Picture of Hydrogen Atom https://www.youtube.com/watch?v=4G7sq5GVhos August 18, 2015 ©2012 Micron Foundation, Inc. | 16