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anonymous

  • one year ago

The deflection of alpha particles in Rutherford’s gold foil experiments resulted in what change to the atomic model? The addition of energy levels and orbitals to the electron cloud The addition of a small, dense nucleus to the center of the atom The addition of wave properties to the characteristics of an electron The addition of neutrons to the nucleus of the atom

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  1. anonymous
    • one year ago
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    Which of the following pairs of elements could possibly be found in the same group on the periodic table? A is an alkali metal; B forms a 1- ion. A has two valence electrons; B forms a 2- ion. A is a noble gas; B has seven valence electrons. A forms a -3 ion; B has five valence electrons.

  2. anonymous
    • one year ago
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    @Photon336

  3. anonymous
    • one year ago
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    n anyone answer these please thanks

  4. anonymous
    • one year ago
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    n atom is determined to contain 17 protons, 18 electrons, and 18 neutrons. What are the mass number and charge of this atom or ion? Mass number: 36, charge: -1 Mass number: 35, charge: +1 Mass number: 35, charge: -1 Mass number: 36, charge: neutral

  5. anonymous
    • one year ago
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    @Cuanchi

  6. Photon336
    • one year ago
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    Addition of a small dense nucleus, he said that the atom was mostly empty space. Surrounded by electrons.

  7. Photon336
    • one year ago
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    Same group would mean same number of valence electrons

  8. anonymous
    • one year ago
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    so it woulod b @Photon336

  9. anonymous
    • one year ago
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    oh never mind can you answer thee onther ones @Photon336

  10. Photon336
    • one year ago
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    For your other question The first two don't make sense because group one and two are the alkali and alkai earth metals and have one and two valence electrons. They are reactive because of the tendency to lose those electrons so they would never have a negative ion. So the first two are out A noble gas configuration would put the element in group 8, an element with seven valence electrons would place it in group 7 alongside the halogens. If something has 5 valence electrons it can take on a charge of -3 to satisfy its octet and still be within the same group so that one to me makes the most sense.

  11. Photon336
    • one year ago
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    For the Rutherford model it would be B he did not show that there are neutrons in the nucleus yet.

  12. anonymous
    • one year ago
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    so it would be c for number 2

  13. anonymous
    • one year ago
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    @Photon336

  14. anonymous
    • one year ago
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    Which question you need help with?

  15. Photon336
    • one year ago
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    For your last one, any element is defined by its atomic number # which is the number of protons. All atoms are electrically neutral # protons = # of electrons unless there's an ion. The mass number is the number of protons and neutrons. And this tells us the existence of isotopes. In this case we have 17 protons that's the atomic number. Now we have 18 electrons because there are more protons our charge is -1. Now the mass number is the number of protons and neutrons which is just 17+18 = 35

  16. anonymous
    • one year ago
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    Which of the following compounds will experience hydrogen bonding? NH3 HBr C2H4 H2SO4

  17. anonymous
    • one year ago
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    What coefficients can be used to balance the following equation? K2CO3 + FeCl3 yields KCl + Fe2 (CO3)3 2, 2, 4, 1 3, 2, 6, 1 1, 1, 2, 1 3, 3, 6, 1 Question 21 (Multiple Choice Worth 2 points) How is percent yield calculated? Measured mass of limiting reactant divided by the measured mass of the excess reactant given at the beginning of the reaction Measured mass of excess reactant divided by the measured mass of the limiting reactant used in the reaction Measured mass of product actually produced divided by calculated mass of product that should be produced by the given amount of reactants Calculated mass of product that should be produced by the given amount of reactants divided by the measured mass of product actually produced

  18. anonymous
    • one year ago
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    @pinkbubbles @Photon336

  19. anonymous
    • one year ago
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    Which of the following compounds will experience hydrogen bonding? Your answer is NH3

  20. anonymous
    • one year ago
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    Can you open a new question please?

  21. anonymous
    • one year ago
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    @jammy987 are you there?

  22. anonymous
    • one year ago
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    yes

  23. anonymous
    • one year ago
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    Can you open a new question please?

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