Questions: Which two electron configurations represent elements that would have similar chemical properties? (1) 1s^2 2s^2 2p^4, (2) 1s^2 2s^2 2p^5, (3) [Ar] 4s^2 3d^10 4p^3, (4) [Ar] 4s^2 3d^10 4p^4 Select one: A. (1) and (3) B. (1) and (2) C. (1) and (4) D. (2) and (4) E. (2) and (3)

Which two electron configurations represent elements that would have similar chemical properties? (1) 1s^2 2s^2 2p^4, (2) 1s^2 2s^2 2p^5, (3) [Ar] 4s^2 3d^10 4p^3, (4) [Ar] 4s^2 3d^10 4p^4

Select one:
A. (1) and (3)
B. (1) and (2)
C. (1) and (4)
D. (2) and (4)
E. (2) and (3)
Transcript text: Which two electron configurations represent elements that would have similar chemical properties? (1) $1 s^{2} 2 s^{2} 2 p^{4}$, (2) $1 s^{2} 2 s^{2} 2 p^{5}$, (3) [Ar] $] s^{2} 3 d^{10} 4 p^{3}$, (4) $[$ Ar] $] s^{2} 3 d^{10} 4 p^{4}$ Select one: A. (1) and (3) B. (1) and (2) C. (1) and (4) D. (2) and (4) E. (2) and (3)
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Solution

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Solution Steps

Step 1: Identify the Valence Electron Configuration
  • The chemical properties of elements are largely determined by their valence electrons.
  • For configuration (1) \(1s^{2} 2s^{2} 2p^{4}\), the valence shell is \(2p^{4}\).
  • For configuration (2) \(1s^{2} 2s^{2} 2p^{5}\), the valence shell is \(2p^{5}\).
  • For configuration (3) [Ar] \(3d^{10} 4p^{3}\), the valence shell is \(4p^{3}\).
  • For configuration (4) [Ar] \(3d^{10} 4p^{4}\), the valence shell is \(4p^{4}\).
Step 2: Compare Valence Electron Configurations
  • Elements with similar chemical properties typically have the same number of valence electrons.
  • Compare the valence electron configurations:
    • (1) \(2p^{4}\) and (4) \(4p^{4}\) both have 4 electrons in the p subshell.
    • (2) \(2p^{5}\) and (4) \(4p^{4}\) do not match.
    • (3) \(4p^{3}\) does not match with any other configuration.
Step 3: Select the Correct Pair
  • Based on the comparison, configurations (1) and (4) both have 4 electrons in their respective p subshells, indicating similar chemical properties.
  • Therefore, the correct answer is C. (1) and (4).

Final Answer

The correct answer is C.

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