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1 | |
The set of quantum numbers that correctly describes an electron in a 3p orbital is |
| | A) | n = 3; l = 0; ml = 0; ms = 0 |
| | B) | n = 3; l = 2; ml = -2, -1, 0, 1, or 2; ms = +½ or -½ |
| | C) | n = 3; l = 1; ml = -1, 0, or 1; ms = +½ or -½ |
| | D) | n = 4; l = 0; ml = -1 ,0, or 1; ms = +½ or -½ |
| | E) | none of the above |
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2 | |
An atom in its ground state contains 18 electrons. How many of these are in orbitals with ml = 0? |
| | A) | 2 |
| | B) | 4 |
| | C) | 6 |
| | D) | 8 |
| | E) | 10 |
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3 | |
When electrons in helium atoms fall from the 3s orbital down to the 1s orbital, how many different energies could be released if all possible pathways of decreasing energy are considered? |
| | A) | 2 |
| | B) | 4 |
| | C) | 5 |
| | D) | 6 |
| | E) | 7 |
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4 | |
The configuration for the six outer electrons in ground state oxygen atoms is |
| | A) | 2s3 2p3 |
| | B) | 2p6 |
| | C) | 2s2 2px2 2py2 |
| | D) | 2s2 2px2 2py1
2pz1 |
| | E) | 2s4
2p2 |
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5 | |
Of the following four electron configurations, which two represent elements that would have similar chemical properties?
1. 1s22s22p5 2.
1s22s22p6 3.
[Ar]4s23d104p4
4. [Ar]4s23d104p5 |
| | A) | 1 and 3 |
| | B) | 1 and 4 |
| | C) | 2 and 3 |
| | D) | 1 and 2 |
| | E) | 2 and 4 |
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6 | |
Which of the following is the electron configuration for chromium, element 24? |
| | A) | 1s2 2s2 2p6 3s2
3p6 4s2 |
| | B) | 1s2 2s2
2p6 3s2 3p6 4s2
3d4 |
| | C) | 1s2 2s2 2p6
3s2 3p6 3d6 |
| | D) | 1s2
2s2 2p6 3s2 3p6
4s1 3d5 |
| | E) | 1s2 2s2
2p6 3s2 3p6 4s2
3d1
3d1 |
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7 | |
Which of the following is not a lanthanide element? |
| | A) | Sm |
| | B) | Hf |
| | C) | Eu |
| | D) | Dy |
| | E) | Ho |
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8 | |
Which of the following statements about periodic properties is incorrect? |
| | A) | Both electron affinity and ionization energy decrease down a group. |
| | B) | Atomic size increases to the right across a period. |
| | C) | Ionization energy increases to the right across a period. |
| | D) | Atomic size increases down a group. |
| | E) | Electron affinity increases to the right across a period. |
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9 | |
Which of the following elements has the greatest ionization energy? |
| | A) | Ga |
| | B) | As |
| | C) | K |
| | D) | Pb |
| | E) | Na |
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10 | |
Which of the following elements has the greatest electron affinity? |
| | A) | Rb |
| | B) | C |
| | C) | Li |
| | D) | Na |
| | E) | I |
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11 | |
Which of the following elements has the greatest metallic character? |
| | A) | Mg |
| | B) | Al |
| | C) | Ca |
| | D) | Ba |
| | E) | Cs |
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12 | |
Which one of the following oxides does not react with water to form acid solutions? |
| | A) | CO2 |
| | B) | SO3 |
| | C) | BaO |
| | D) | NO2 |
| | E) | Cl2O7 |
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13 | |
In the telluride ion, how many electrons are in p orbitals? |
| | A) | 52 |
| | B) | 28 |
| | C) | 24 |
| | D) | 20 |
| | E) | 22 |
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14 | |
The electron configuration for Fe2+ is 1s2 2s2
2p6 3s2 3p6 3d6.
Therefore Fe2+ is |
| | A) | paramagnetic with two unpaired electrons. |
| | B) | paramagnetic with one unpaired electron. |
| | C) | paramagnetic with three unpaired electrons. |
| | D) | paramagnetic with four unpaired electrons. |
| | E) | diamagnetic. |
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15 | |
Which of the following ions and atoms has the largest radius? |
| | A) | Mg |
| | B) | Na |
| | C) | Na+ |
| | D) | Mg2+ |
| | E) | Al |
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