Atoms & Periodic Table

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Author:
mmesires
ID:
52693
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Atoms & Periodic Table
Updated:
2010-12-01 17:07:15
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7th science
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Atomic Theory, Parts of the Atom and the Periodic Table
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  1. This scientist coined the term "atom" and said that it was an uncuttable particle.
    Democritus
  2. This scientist said that atoms combine in specific proportions and atoms of the same element were alike.
    Dalton
  3. This scientist created the "plum pudding" model of the atom based on his cathode ray tube experiment.
    Thomson
  4. This scientist said that the center of the atom was positively charged and he coined the term "nucleus" for it based on his gold foil experiment.
    Rutherford
  5. This scientist said that electrons travel in definite paths around the nucleus.
    Bohr
  6. These scientists cointed the term "electron cloud"
    Schrodinger & Heisenberg
  7. Which subatomic particle has a positive charge, a mass of 1 and is found in the nucleus?
    Proton
  8. Which subatomic particle is found in the nucleus, has a mass of 1 and has no charge?
    Neutron
  9. Which subatomic particle has a negative charge, no mass and is found outside the nucleus?
    Electron
  10. The number of total protons in the nucleus is known as this.
    Atomic number
  11. The number of protons in addition to the number of neutrons is known as this.
    Atomic mass
  12. When an atom has a different number of neutrons from its regular atom, it is known as this.
    Isotope
  13. This is the listing of all the elements that are exiting and that have been created.
    Periodic Table
  14. A regular repeating pattern.
    Periodic
  15. These elements are on the left side of the periodic table, have a small number of electrons in the outer shell, are reactive, ductile, malleable and shiny.
    Metals
  16. These elements are on the right side of the periodic table, are not shiny, ductile or malleable and are often gases.
    Nonmetal
  17. These elements sit on the zigzag line of the periodic table and have characteristics of both metals and nonmetals.
    Metalloids
  18. A row on the periodic table arranged by increasing atomic number.
    Period
  19. A column or family on the periodic table made up of elements who have very similar chemical and physical properties
    Group
  20. This is the most abundant element in the universe.
    Hydrogen
  21. The most reactive metals on the periodic table. They have one electron in the outer level.
    Alkali metals
  22. These nonmetals have a full outer electron shell and are unreactive or inert.
    Noble gases
  23. These metals are the second most reactive elements on the table and have two electrons in the outer most level.
    Alkali earth metals
  24. The most reactive nonmetals or salt formers.
    Halogens
  25. These metals form colored solutions in water.
    Transition metals
  26. These are the radioactive metals on the periodic table.
    Actinide series

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