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Greek Dalton’s Philosophers Atomic Theory The atom Subatomic particles How atoms differ Radioactivit y Types of radiation 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 3 3 3 3 3 3 3 4 4 4 4 4 4 4 A1 Said that matter is made of atoms which move through empty space A2 Stated that empty space cannot exist and that matter is made up of earth fire, and water A3 Marked the beginning of the modern atomic theory A4 Dalton’s idea’s were most like who?? B1 Atoms are composed of extremely small particles called? B2 Atoms of a given element had identical what? B3 Atoms do this when they combine to make compounds B4 In a chemical reaction, atoms do this. C1 The smallest part particle of an element that retains the properties of the element. C2 Discovered by JJ Thomson, this atomic particle was found using a cathode ray tube C3 The model Thomson composed that states that the atom is a uniform, positively charged sphere containing electrons. C4 The scientist and name of the experiment who used the Plum Pudding model to determine properties of the nucleus, including charge, relative size, and density D1 Carries a positive charge and is located in the nucleus of the atom D2 Discovered by James Chadwick, contains a neutral charge, is located in the nucleus, is about the same mass as a proton D3 Carries a negative charge, located surrounding the nucleus, and has a mass much smaller than a proton and neutron D4 Most of the atoms’ mass E1 The number of protons in an atom is also the elements identity E2 Atoms with the same number of protons but different number of neutrons E3 The atomic number plus the number of neutrons E4 Defined as one twelfth the mass of a carbon-12 atom. (An easier way to express the mass of an atom F1 The rays and particles emitted by radioactive material F2 A reaction that involves a change in an atom’s nucleus. F3 Unstable nuclei lose energy by emitting radiation in this spontaneous process. F4 Substances that spontaneously emit radiation is called this process G1 Contains two protons and two neutrons and is equivalent to a Helium-4 nucleus G2 Consists of a fast moving electron G3 High energy radiation that possess no mass usually accompanies alpha and beta radiation G4 The quantities that are conserved when balancing a nuclear reaction A1 Democritus A2 Aristotle A3 Dalton A4 Democritus B1 ATOMS B2 Size, Shape, and Mass B3 Combine in simple whole number ratios B4 Separate, combine and rearrange C1 ATOM C2 Electron C3 Plum Pudding model C4 Rutherford – Gold Foil Experiment D1 PROTON D2 Neutron D3 Electron D4 Nucleus E1 Atomic Number E2 Isotope E3 Mass Number E4 amu F1 Radiation F2 Nuclear reaction F3 Radioactive decay F4 Radioactivity G1 Alpha particle G2 Beta particle G3 Gamma ray G4 Mass number and atomic number