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Which of the following elements is not paramagnetic?
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10. Periodic Properties of the Elements
Paramagnetism and Diamagnetism
Multiple Choice
Which of the following ground state ions is paramagnetic?
A
Mn^{2+}
B
Cu^+
C
Cd^{2+}
D
Ni^{2+}
검증된 단계별 안내1
Recall that a paramagnetic species has one or more unpaired electrons, while a diamagnetic species has all electrons paired.
Determine the electron configuration of the neutral atoms for each element: Mn, Cu, Cd, and Ni.
Remove the appropriate number of electrons to form the given ions (e.g., Mn^{2+} means removing 2 electrons from Mn's neutral configuration).
Analyze the electron configuration of each ion to identify the number of unpaired electrons.
Identify which ion has unpaired electrons, making it paramagnetic; in this case, Mn^{2+} has unpaired electrons, so it is paramagnetic.
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