Multiple Choice
Which of the following represents the ground state electron configuration for arsenic (As)?
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10. Periodic Properties of the Elements
The Electron Configuration
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Which element has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10}?
A
Copper (Cu)
B
Nickel (Ni)
C
Zinc (Zn)
D
Iron (Fe)
Verified step by step guidance1
Identify the total number of electrons represented by the given electron configuration: $1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10}$.
Calculate the number of electrons in each subshell and sum them up: $2 + 2 + 6 + 2 + 6 + 2 + 10$.
Determine the atomic number corresponding to the total number of electrons, since the element is neutral and the atomic number equals the number of electrons.
Match the atomic number to the element on the periodic table to identify which element has this electron configuration.
Confirm that the element with this atomic number is Zinc (Zn), which has an atomic number of 30.
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