Assessment Arrangement of Electrons in Atoms - Ed W. Clark ...
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Arrangement of Electrons in Atoms
Section Quiz: Electron Configurations
In the space provided, write the letter of the term or phrase that best completes each statement or best answers each question.
______ 1. The statement that no two electrons in the same atom can have the same four quantum numbers is a restatement of a. Bohr's law. b. Hund's rule. c. the Aufbau principle. d. the Pauli exclusion principle.
______ 2. According to the Aufbau principle, which of the following sublevels is lowest in energy? a. 3d b. 4s c. 4p d. 5s
______ 3. In a ground-state hydrogen atom in which orbital is the electron? a. 1s b. 2s c. 2p d. 3s
______ 4. How many electrons are present in an atom of calcium that has the electron configuration 1s22s22p63s23p64s2? a. 6 b. 16 c. 20 d. 36
______ 5. The ground-state electron configuration of neon is 1s22s22p6. In this arrangement, how many of neon's p orbitals are completely filled? a. 1 b. 2 c. 3 d. 6
Copyright ? by Holt, Rinehart and Winston. All rights reserved.
Modern Chemistry
23
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Section Quiz, continued
______ 6. Oxygen has an electron configuration of 1s22s22p4. In this arrangement, how many inner-shell electrons does oxygen have? a. 1 b. 2 c. 4 d. 8
______ 7. Which of the following is a noble gas? a. carbon b. oxygen c. sodium d. neon
______ 8. The noble-gas notation for the electron configuration of bromine is [Ar] 3d104s24p5. How many unpaired electrons are there in an atom of bromine in the ground state? a. 0 b. 1 c. 3 d. 5
______ 9. A ground-state atom of which element has one electron in its fourth and outermost main energy level? a. K b. Na c. B d. Ga
______10. Separating unpaired electrons into as many orbitals as possible a. places the electrons farther from the nucleus. b. results in more valence electrons. c. minimizes the repulsion between electrons. d. produces a greater spin quantum number.
Copyright ? by Holt, Rinehart and Winston. All rights reserved.
Modern Chemistry
24
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LTeEsAsCoHnER RESOPUrRiCnEt PAGE
Answer Key
1 Matter and Change
Section: Chemistry is a Physical Science
1. d
2. a
3. b
4. d
5. a
6. d
7. c
8. c
9. b
10. c
Section: Matter and its Properties
1. c
2. a
3. b
4. a
5. c
6. d
7. b
8. a
9. a
10. c
Section: Elements
1. c
2. c
3. a
4. c
5. d
6. a
7. b
8. c
9. d
10. b
2 Measurements and Calculations
Section: Scientific Method
1. d
2. a
3. c
4. a
5. d
6. d
7. c
8. d
9. b
10. b
Section: Units of Measurement
1. c
2. d
3. d
4. b
5. d
6. a
7. a
8. b
9. a
10. c
Section: Using Scientific Measurements
1. b
2. b
3. b
4. b
5. d
6. b
7. b
8. c
9. d
10. c
3 Atoms: The Building Blocks of Matter
Section: The Atom: From Philosophical
Idea to Scientific Theory
1. b
2. c
3. a
4. d
5. c
6. d
7. b
8. c
9. d
10. b
Section: The Stucture of the Atoms
1. b
2. d
3. a
4. c
5. b
6. c
7. d
8. b
9. c
10. c
Section: Counting Atoms
1. c
2. c
3. a
4. d
5. b
6. b
7. c
8. a
9. b
10. c
4 Arrangement of Electrons in Atoms
Section: The Development of a New
Atomic Model
1. a
2. b
3. c
4. b
5. c
6. a
7. d
8. c
9. b
10. a
Section: The Quantum Model of the Atom
1. c
2. a
3. c
4. b
5. a
6. b
7. d
8. c
9. b
10. c
Section: Electron Configurations
1. d
2. b
3. a
4. c
5. c
6. b
7. d
8. b
9. a
10. c
Copyright ? by Holt, Rinehart and Winston. All rights reserved.
Modern Chemistry
152
Answer Key
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