Chem Test 10-29-13

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Chem Test 10-29-13
2013-10-29 03:06:46

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  1. The total number of d orbitals in the third principal
  2. What is the maximum number of electrons that can occupy the second principal energy level?
  3. A neutral atom in the ground state contains 16 electrons. What is the total number of electrons in the 2p sublevel?
  4. What is the total number of orbitals in the third principal energy level?
  5. Which of the following sublevels contains the greatest number of orbitals?
  6. What is the maximum number of electrons in an orbital of any atom?
  7. A neutral atom of an element has an electron configuration of 2–8–2. What is the total number of p electrons in this atom?
  8. Which particle is electrically neutral?
  9. Which conclusion was a direct result of the gold foil experiment?
    An atom is mostly empty space with a dense,positively charged nucleus
  10. In Rutherford's gold foil experiments, some alpha particles were deflected from their original paths but most passed through the foil with no deflection. Which statement about gold atoms is supported by these experimental observations?
    Gold atoms consist mostly of empty space.
  11. What is the mass number of an atom that has six protons, six electrons, and eight neutrons?
  12. Atoms of different isotopes of the same element differin their total number of
  13. Isotopes of an element must have different
    mass numbers
  14. A 100.00-gram sample of naturally occurring boron contains 19.78 grams of boron-10 (atomic mass = 10.01 atomic mass units) and 80.22 grams of boron-11(atomic mass = 11.01 atomic mass units). Which numerical setup can be used to determine the atomic mass of naturally occurring boron?
    (0.1978)(10.01) + (0.8022)(11.01)
  15. Which statement best explains why most atomic masses on the Periodic Table are decimal numbers?
    Atomic masses are a weighted average of thenaturally occurring isotopes.
  16. Which model correctly describes the locations of protons and electrons in the wave-mechanical model of the atom?
    in the nucleus, regions of most probably location
  17. What is the maximum number of electrons that can occupy the fourth principal energy level (shell) of an atom?
  18. Compared to an atom of hydrogen in the ground state, an atom of hydrogen in the excited state has
    absorbed energy
  19. An atom with the electron configuration 2-8-8-2 has an incomplete
    3rd principal energy level
  20. An atom of oxygen is in an excited state. When an electron in this atom moves from the third shell to the second shell, energy is
    emitted by the electron
  21. The characteristic bright-line spectrum of an element occurs when electrons
    move from higher to lower energy levels
  22. The atomic number of an atom is always equal to thetotal number of
    protons in the nucleus
  23. The mass of a calcium atom is due primarily to the mass of its
    protons and neutrons