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1 | |
What is the frequency of electromagnetic radiation with a wavelength of 562 nm? |
| | A) | 1.87 x 10-15 Hz |
| | B) | 5.34 x 1014 Hz |
| | C) | 5.34 x 105 Hz |
| | D) | 1.87 x 108 Hz |
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2 | |
How many photons of light having a wavelength of 656 nm are necessary to provide 1.0 J of energy? |
| | A) | 3.52 x 10-28 |
| | B) | 3.03 x 10-19 |
| | C) | 2.84 x 1027 |
| | D) | 3.30 x 1018 |
| | E) | None of the above. |
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3 | |
Which of the following sets of quantum numbers is not allowed? |
| | A) | n = 2, l = 2, ml = 0 |
| | B) | n = 3, l = 1, ml = -1 |
| | C) | n = 2, l = 0, ml = 0 |
| | D) | n = 3, l = 2, ml = 0 |
| | E) | n = 2, l = 1, ml = 1 |
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4 | |
The set of quantum numbers that correctly describes an electron in a 3s orbital is: |
| | A) | n = 3; l = 0; ml = 0; ms = 0 |
| | B) | n = 3; l = 2; ml = -2, -1, 0, 1, or 2; ms = +1/2 or -1/2 |
| | C) | n = 3; l = 1; ml = -1, 0, or 1; ms = +1/2 or - 1/2 |
| | D) | n = 4; l = 0; ml = -1, 0, or 1; ms = +1/2 or -1/2 |
| | E) | None of the above. |
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5 | |
A neutral atom in its ground state contains 30 electrons. This element is considered a __________ element, and has _______ electrons in orbitals with l = 2. |
| | A) | transition, 8 |
| | B) | actinide, 10 |
| | C) | representative, 10 |
| | D) | lanthanide, 10 |
| | E) | transition, 10 |
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6 | |
An atom in its ground state contains 18 electrons. How many of these electrons are in orbitals with l = 0? |
| | A) | 2 |
| | B) | 4 |
| | C) | 6 |
| | D) | 8 |
| | E) | 10 |
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7 | |
The electronic configuration for K is |
| | A) | 1s22s22p63s23p64s03d1 |
| | B) | 1s22s22p63s23p64s2 |
| | C) | 1s22s22p63s23p63d64s1 |
| | D) | 1s22s22p63s23p64s1 |
| | E) | None of the above. |
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8 | |
An aluminum atom has ____ unpaired electron(s). |
| | A) | 4 |
| | B) | 1 |
| | C) | 7 |
| | D) | 0 |
| | E) | 3 |
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9 | |
The fact that no two electrons in an atom have the same four quantum numbers is a reflection of |
| | A) | Hund's rule. |
| | B) | the dual nature of the electron. |
| | C) | the photoelectric effect. |
| | D) | the Heisenberg uncertainty principle. |
| | E) | the Pauli Exclusion principle |
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10 | |
The unusual electron configuration of Mo indicates the |
| | A) | unusual stability of half-filled d-orbitals. |
| | B) | unpredictability of the electron filling patterns of the non-representative elements. |
| | C) | unusually large size of Mo atoms. |
| | D) | greater than expected electronegativity of Mo. |
| | E) | B and C. |
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