Download Chemistry I CP1 chapter 5 Study Guide on Electron Configuration

Chemistry I CP1 chapter 5 Study Guide on Electron Configuration
Moyer
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1. For electromagnetic radiation, c (the speed of light) equals
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2. The distance between two successive peaks on adjacent waves is its
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3. A quantum of electromagnetic energy is called a(n)
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4. Because excited hydrogen atoms always produce the same line-emission spectrum, scientists concluded that
hydrogen
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5. For an electron in an atom to change from the ground state to an excited state,
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6. If electrons in an atom have the lowest possible energies, the atom is in the
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7. Which energy-level change shown in the diagram below emits the highest energy?
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8. The change of an atom from an excited state to the ground state always requires
____
9. The size and shape of an electron cloud are most closely related to the electron's
____ 10. A three-dimensional region around a nucleus where an electron may be found is called a(n)
____ 11. The quantum number that indicates the position of an orbital about the three axes in space is the
____ 12. How many quantum numbers are needed to describe the energy state of an electron in an atom?
____ 13. The main energy levels of an atom are indicated by the
____ 14. The angular momentum quantum number indicates the
____ 15. Each atomic orbital is described by its principal quantum number followed by the
____ 16. The spin quantum number of an electron can be thought of as describing
____ 17. An electron for which n = 4 has more ____ than an electron for which n = 2.
____ 18. A spherical electron cloud surrounding an atomic nucleus would best represent
____ 19. The major difference between a 1s orbital and a 2s orbital is that
a. the 2s orbital can hold more electrons.
b. the 2s orbital has a slightly different shape.
c. the 2s orbital is at a higher energy level.
d. the 1s orbital can have only one electron.
____ 20. The p orbitals are shaped like
____ 21. The letter designations for the first four sublevels with the maximum number of electrons that can be
accommodated in each sublevel are
____ 22. The number of orbitals for the d sublevel is
____ 23. How many electrons can occupy the s orbitals at each energy level?
____ 24. How many electrons are needed to completely fill the fourth energy level?
____ 25. The statement that no two electrons in the same atom can have the same four quantum numbers is
a. the Pauli exclusion principle.
c. Bohr's law.
b. Hund's rule.
d. the Aufbau principle.
____ 26. The atomic sublevel with the next highest energy after 4p is
____ 27. Which of the following lists atomic orbitals in the correct order they are filled according to the Aufbau
principle?
a. 1s 2s 2p 3s 4s 3p 3d 4p 5s
b. 1s 2s 2p 3s 3p 4s 3d 4p 5s
c. 1s 2s 2p 3s 3p 4s 4p 3d 4d
d. 1s 2s 2p 3s 3p 3d 4s 4p 5s
____ 28. The electron configuration for the carbon atom (C) is 1s2 2s2 2p2. The atomic number of carbon is
____ 29. The electron notation for aluminum (atomic number 13) is
a. 1s2 2s2 2p3 3s2 3p3 3d1.
b. 1s2 2s2 2p6 3s2 2d1.
c. 1s2 2s2 2p6 3s2 3p1.
d. 1s2 2s2 2p9.
____ 30. The number of electrons in the highest energy level of the argon atom (atomic number 18) is
a. 10.
c. 6.
b. 2.
d. 8.
____ 31. If the s and p sublevels of the highest main energy level of an atom are filled, how many electrons are in this
main energy level?
____ 32. Which type of orbital is shown?
____ 33. Which type of orbital is shown?
____ 34. Which is the correct number of valence electrons in the element Gallium (Ga)?
____ 35. Which of these elements has 5 valence electrons?
a. Boron (B)
c. Vanadium (V)
b. Rubidium (Rb)
d. Arsenic (As)
____ 36. Which is the correct electron dot diagram for the element Silicon (Si)?
____ 37. Which is the correct electron dot structure for the element Fluorine (F)?
Short Answer
38. Explain why it is only possible for two electrons to exist in the same orbital.
39. Use the model of the atom shown to identify the correct element. Write the electron configuration and orbital
diagram for this element.
40. Explain what is wrong with this electron dot diagram for the element Nitrogen (N).
Chemistry I CP1 chapter 5 test on Electron Configuration
Answer Section
MULTIPLE CHOICE
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D
1
B
2
A
3
C
3
B
4
A
4
C
4
B
4
D
2
C
3
C
4
D
4
D
4
B
4
D
4
A
4
C
4
A
5
C
5
C
5
C
5
C
PTS: 1
DIF: I
REF: 1
PTS: 1
DIF: I
REF: 1
PTS: 1
DIF: I
REF: 1
PTS: 1
DIF: II
REF: 1
PTS: 1
DIF: II
REF: 1
PTS: 1
DIF: I
REF: 1
PTS: 1
DIF: I
REF: 1
PTS: 1
DIF: II
REF: 1
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: II
REF: 2
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5
A
5
C
1
A
2
D
2
B
3
B
3
C
3
D
3
B
3
C
UCP.2 | B.1
B
UCP.2 | B.1
D
UCP.2 | B.1
D
UCP.2 | B.1
A
UCP.2 | B.1
B
UCP.2 | B.1
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: I
REF: 3
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: II
REF: 3
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DIF: I
REF: 3
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STA:
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DIF: Bloom's Level 1
1
C-2.1
1
C-2.1
1
C-2.2
1
C-2.2
1
C-2.2
1
C-2.2
DIF: Bloom's Level 1
DIF: Bloom's Level 3
DIF: Bloom's Level 4
DIF: Bloom's Level 3
DIF: Bloom's Level 3
SHORT ANSWER
38. ANS:
Electrons have a spin. In any given orbital, only two electrons can exist because one will spin in an “upward”
direction while the other one spins in a “downward” direction. A pair of electrons can only exist in an orbital
if they are spinning in opposite directions.
PTS: 1
DIF: Bloom's Level 3
NAT: B.1
STA: C-2.1
39. ANS:
The element is Silicon. The electron configuration is 1s2s222p63s23p6. The orbital diagram is shown below.
PTS: 1
DIF: Bloom's Level 5
NAT: UCP.2 | B.1
STA: C-1.5 | C-2.1
40. ANS:
The diagram shown has two major problems. First, seven dots are shown to represent electrons; although
Nitrogen has 7 total electrons it only has 5 valence electrons, and only valence electrons are represented in an
electron dot diagram. Second, no more than two electrons are placed on a single side of the element symbol,
since each orbital can hold only 2 electrons at the most.
PTS: 1
DIF: Bloom's Level 6
STA: C-1.6 | C-2.1
NAT: UCP.2 | B.1