Chemistry 1411 Test 3 Review- University of Houston/Chemistry 1411 Test 3 Review- University of Houston/Chemistry 1411 Test 3 Review- University of Houston
chem 1411 test 3 review
____ 1. Which form of electromagnetic radiation has the longest wavelengths?
A) gamma rays
B) microwaves
C) radio waves
D) infrared radiation
E) x-rays
____ 2. Which of the following frequencies corresponds to light with the longest wavelength?
A) 3.00 1013 s–1
B) 4.12 105 s–1
C) 8.50 1020 s–1
D) 9.12 1012 s–1
E) 3.20 109 s–1
____ 3. Which of the following are incorrectly paired?
A) wavelength –
B) frequency –
C) speed of light – c
D) hertz – s–1
E) x-rays – shortest wavelength
____ 4. Which one of the following types of radiation has the shortest wavelength, the greatest energy, and
the highest frequency?
A) Ultraviolet radiation.
B) Infrared radiation.
C) Visible red light.
D) Visible blue light.
E) None, because short wavelength is associated with low energy and low frequency,
not high energy and high frequency.
____ 5. Which of the following is incorrect?
A) The emission spectrum of hydrogen contains a continuum of colors.
B) Diffraction produces both constructive and destructive interference.
C) All matter displays both particle and wavelike characteristics.
D) Niels Bohr developed a quantum model for the hydrogen atom.
E) The lowest possible energy state of a molecule or atom is called its ground state.
____ 6. Which of the following best describes an orbital?
A) space where electrons are unlikely to be found in an atom
B) space which may contain electrons, protons, and/or neutrons
C) the space in an atom where an electron is most likely to be found
D) small, walled spheres that contain electrons
E) a single space within an atom that contains all electrons of that atom
____ 7. Consider the following representation of a 2p-orbital:
, Which of the following statements best describes the movement of electrons in a p-orbital?
A) The electrons move along the outer surface of the p-orbital, similar to a “figure 8”
type of movement.
B) The electrons move within the two lobes of the p-orbital, but never beyond the
outside surface of the orbital.
C) The electrons are concentrated at the center (node) of the two lobes.
D) The electrons are only moving in one lobe at any given time.
E) The electron movement cannot be exactly determined.
____ 8. Which of the following combinations of quantum numbers is not allowed?
A) n = 1, l = 1, ml = 0, ms =
B) n = 3, l = 0, ml = 0, ms = -
C) n = 2, l = 1, ml = -1, ms =
D) n = 4, l = 3, ml = -2, ms = -
E) n = 4, l = 2, ml = 0, ms =
____ 9. Which of the following was not an elemental property usually predicted by Mendeleev for
as-yet-unknown elements?
A) electron configuration
B) atomic mass
C) density
D) boiling point
E) oxide formula
____ 10. Which of the following atoms or ions has three unpaired electrons?
A) N
B) O
C) Al
D) S2–
E) Ti2+
____ 11. The electron configuration for the barium atom is:
A) 1s22s22p63s23p64s23d10
B) [Xe]6s2
C) 1s22s22p63s23p64s1
D) 1s22s22p63s23p64s2
E) none of these
____ 12. The complete electron configuration of tin is
A) 1s22s22p63s23p64s23d104p65s24d105d105p2
B) 1s22s22p63s23p64s23d104d104p2
C) 1s22s22p63s23p64s24p65s24d105d105p2
D) 1s22s22p63s23p64s23d104p65s24d105p2
E) none of these
, ____ 13. Which of the following statements about quantum theory is incorrect?
A) The energy and position of an electron cannot be determined simultaneously.
B) Lower energy orbitals are filled with electrons before higher energy orbitals.
C) When filling orbitals of equal energy, two electrons will occupy the same orbital
before filling a new orbital.
D) No two electrons can have the same four quantum numbers.
E) All of these are correct.
____ 14. An element with the electron configuration [Xe] 6s24f145d7 would belong to which class on the
periodic table?
A) transition elements
B) alkaline earth elements
C) halogens
D) rare earth elements
E) none of the above
____ 15. All alkaline earths have the following number of valence electrons:
A) 1
B) 3
C) 6
D) 2
E) none of these
____ 16. In which group do all the elements have the same number of valence electrons?
A) P, S, Cl
B) Ag, Cd, Ar
C) Na, Ca, Ba
D) P, As, Se
E) none of these
____ 17. Of the following elements, which has occupied d orbitals in its ground-state neutral atoms?
A) Ba
B) Ca
C) Si
D) P
E) Cl
____ 18. Of the following elements, which needs three electrons to complete its valence shell?
A) Ba
B) Ca
C) Si
D) P
E) Cl
____ 19. 1s22s22p63s23p64s23d2 is the correct electron configuration for which of the following atoms?
A) Ca
B) Ti
C) Ge
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