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He used a gold foil to discover the existence of the nucleus

He used a gold foil to discover the existence of the nucleus. Who is…. E. Rutherford. Dalton’s atomic theory includes the following?. Atoms are indivisible. All atoms of the same element are identical All atoms of different elements are different from the others.

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He used a gold foil to discover the existence of the nucleus

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  1. He used a gold foil to discover the existence of the nucleus Who is… E. Rutherford

  2. Dalton’s atomic theory includes the following? • Atoms are indivisible. • All atoms of the same element are identical • All atoms of different elements are different from the others. • Atoms can combine in small whole number ratios to form compounds.

  3. Because of J.J. Thomson’s experiement what had to be changed in Dalton’s atomic theory? • Atoms were now known to NOT be indivisible. Atoms ARE divisible because electrons are part of atoms.

  4. The Plum pudding models was • The model J.J. Thomson came up with to explain the existance of protons.

  5. The Gold foil experiment. • Rutherford used a radioactive isotope and gold foil to discover the existance of protons.

  6. Because of Rutherford, the following modification had to be made to Dalton’s atomic theory? • A positively charged nucleus surrounded by electrons was hypothesized.

  7. The first column of elements on the periodic table… • Alkali metals • What are…

  8. The second column on the periodic table..What are… • Alkaline Earth Metals

  9. The farthest right column in the periodic table… What are • The noble gases?

  10. The second to last group on the right side of the periodic table… What are… • Halogens?

  11. The elements found in the upper right corner of the periodic table? • What are the nonmetals?

  12. Metalloids are • In between metals and nonmetals.

  13. A substance which is shiny, ductile and malleable. • What is a metal?

  14. In One can calculate the number of neutrons as… Mass number – atomic number = 90 – 38 = 52 neutrons What is…

  15. In the 80 stands for The atomic number which equals number of protons. What is…

  16. He used a cathode ray tube to discover electrons Who is… J.J. Thomson

  17. In the 30 stands for What is… The atomic number which equals number of protons

  18. Lead-206 and lead-207 are examples of this What are… Isotopes

  19. In the 201 stands for The mass number which equals number of protons plus neutrons What is…

  20. In the 65 stands for The mass number which equals number of protons plus neutrons What is…

  21. The first experimental atomic theory Who is… John Dalton

  22. In there are 35 of these What is… The number of neutrons.

  23. In there are 121 of these… The number of neutrons in What is…

  24. In there are 121 of these… The number of neutrons in What is…

  25. In there are 38 of these… The number of protons in What is…

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