Elements, Quantum Numbers, And Electron Configurations
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Questions and Answers
- 1.
Number of electrons that can be in 3p orbitals?
- A.
6
- B.
8
- C.
3
Correct Answer
A. 6Explanation
The number of electrons that can be in 3p orbitals is 6. This is because the p orbital can accommodate a maximum of 6 electrons. Each p orbital can hold 2 electrons, and there are 3 p orbitals in the 3p sublevel. Therefore, the total number of electrons that can be in 3p orbitals is 2 electrons per p orbital multiplied by 3 p orbitals, which equals 6 electrons.Rate this question:
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- 2.
It is possible to have a 7d orbital?
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Yes, it is possible to have a 7d orbital. In quantum mechanics, orbitals are regions in an atom where an electron is most likely to be found. The "7d" refers to the principal quantum number (n=7) and the azimuthal quantum number (l=2), which determines the shape of the orbital. The d orbitals have a complex shape and can hold a maximum of 10 electrons. Therefore, it is possible to have a 7d orbital in an atom with a high principal quantum number.Rate this question:
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- 3.
How many electrons can have the principal quantum number of 4?
Correct Answer
32Explanation
The principal quantum number represents the energy level or shell of an electron in an atom. The formula to calculate the maximum number of electrons in a shell is 2n^2, where n is the principal quantum number. In this case, when n=4, the maximum number of electrons in the fourth energy level is 2(4^2) = 32. Therefore, 32 electrons can have a principal quantum number of 4.Rate this question:
- 4.
Spell the name of the element F.
Correct Answer
fluorineExplanation
The correct answer is "fluorine" because the question asks for the name of the element with the symbol "F". Fluorine is the chemical element with the symbol F and atomic number 9. It is a pale yellow, highly reactive gas, and is the lightest halogen.Rate this question:
- 5.
A valid magnetic quantum number for the element Si is -3.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The magnetic quantum number (m) represents the orientation of an electron's orbital in a magnetic field. It can have integer values ranging from -l to +l, where l is the orbital angular momentum quantum number. For the element Si, the ground state electron configuration is 1s² 2s² 2p⁶ 3s² 3p². The 3p orbital can have three possible magnetic quantum numbers: -1, 0, and +1. Therefore, -3 is not a valid magnetic quantum number for the element Si.Rate this question:
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- 6.
Spell the name of the element P.
Correct Answer
Phosphorus, phosphorusExplanation
The correct answer is "phosphorus." Phosphorus is a chemical element with the symbol P. It is a nonmetal that is essential for life and is found in DNA, RNA, and ATP. It is also used in fertilizers, detergents, and matches.Rate this question:
- 7.
The electron configuration for chromium is
- A.
1s2 2s2 2p6 3s2 3p6 4s2 3d4
- B.
1s2 2s2 2p6 3s2 3p6 4s1 3d5
- C.
1s2 2s2 2p6 3s2 3p6 4s2 4d4
- D.
1s2 2s2 2p6 3s2 3p6 4s1 4d5
Correct Answer
B. 1s2 2s2 2p6 3s2 3p6 4s1 3d5Explanation
The electron configuration for chromium is 1s2 2s2 2p6 3s2 3p6 4s1 3d5. This is because chromium has an atomic number of 24, meaning it has 24 electrons. The electron configuration represents the arrangement of these electrons in different energy levels and orbitals. The first four energy levels (1s, 2s, 2p, and 3s) are completely filled with 2 electrons each. The 3p orbital is also completely filled with 6 electrons. The 4s orbital has 1 electron, and the 3d orbital has 5 electrons. Therefore, the correct electron configuration for chromium is 1s2 2s2 2p6 3s2 3p6 4s1 3d5.Rate this question:
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- 8.
What element(s) could have the quantum numbers 3, 1, -1, -1/2?
- A.
Sulfur
- B.
Oxygen
- C.
Aluminum
- D.
Sodium
- E.
Lithium
Correct Answer
A. SulfurExplanation
The quantum numbers provided are n=3, l=1, ml=-1, and ms=-1/2. These quantum numbers correspond to the third energy level (n=3), the p orbital (l=1), the px orbital (ml=-1), and the spin-down electron (ms=-1/2). Sulfur is the only element that has electrons in the 3p orbital, making it the correct answer.Rate this question:
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Apr 15, 2024Quiz Edited by
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Sep 07, 2011Quiz Created by
Pamela Mork
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