Textbook Question
Specify the electron configuration for each of the following atoms and ions.
(a) Cr
(b) Cr3+
1
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24. Transition Metals and Coordination Compounds
Electron Configurations of Transition Metals: Exceptions
Multiple Choice
Given the following electron configuration, determine the identity of ion with +2 charge.
A
Pd2+
B
Ru2+
C
Pb2+
D
Cd2+
Verified step by step guidance1
Step 1: Analyze the given electron configuration diagram. The diagram shows the filling of orbitals with arrows representing electrons and their spins. Count the total number of electrons represented by the arrows in the orbitals.
Step 2: Identify the orbitals shown in the diagram. The orbitals are labeled as 4d and 5s. Count the electrons in the 4d orbitals and the 5s orbital separately.
Step 3: Sum the electrons in the 4d and 5s orbitals to find the total number of electrons in the neutral atom. This total corresponds to the atomic number of the element.
Step 4: Determine the element by matching the total number of electrons to the atomic number on the periodic table. This will identify the neutral atom before ionization.
Step 5: Since the ion has a +2 charge, subtract 2 electrons from the total electron count to find the electron configuration of the ion. Confirm that the resulting electron configuration matches the one given in the diagram, which will confirm the identity of the ion.
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