Electronic Structure (Ps 25)
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Which electron configuration corresponds to that of a noble gas?
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This quiz, titled 'Electronic Structure (PS 25)', evaluates understanding of atomic and electronic structures. It includes questions on electron configurations, quantum numbers, and properties of elements like electron count and deviations from the Aufbau principle. Essential for students studying advanced chemistry.
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- 2.
Which element has a valence electron configuration of ?
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Li
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Na
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K
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Rb
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Cs
Correct Answer
A. KExplanation
The element with a valence electron configuration of [Ar] 4s1 is K (potassium). This means that potassium has one valence electron in its outermost energy level.Rate this question:
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- 3.
Which of the following elements has the greatest number of p electrons?
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C
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Si
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Fe
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Cl
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As
Correct Answer
A. AsExplanation
As (arsenic) has the greatest number of p electrons among the given elements. The electron configuration of As is [Ar] 3d10 4s2 4p3, which means it has 5 p electrons. In comparison, C (carbon) has 2 p electrons, Si (silicon) has 3 p electrons, Fe (iron) has 0 p electrons, and Cl (chlorine) has 3 p electrons. Therefore, As has the greatest number of p electrons.Rate this question:
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- 4.
Which of the following is an impossible set of quantum numbers?
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2, 0, 0, 1/2
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2, 1, -1, -1/2
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3, 1, -1, +1/2
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1, 1, 1, -1/2
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3, 2, 1, 1/2
Correct Answer
A. 1, 1, 1, -1/2 -
- 5.
Which of the following elements has an electron configuration that does NOT follow the Aufbau principle?
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Fe
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Mg
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Al
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Ag
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Ni
Correct Answer
A. AgExplanation
Ag (Silver) has an electron configuration that does NOT follow the Aufbau principle. The Aufbau principle states that electrons fill the lowest energy levels first before moving to higher energy levels. However, in the case of Ag, the electron configuration is [Kr] 4d^10 5s^1, which suggests that one electron from the 4d orbital has moved to the 5s orbital. This violates the Aufbau principle as the 4d orbital should be filled before moving to the 5s orbital.Rate this question:
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Mar 20, 2023Quiz Edited by
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Mar 13, 2012Quiz Created by
Comerchemistry