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Chapter 3: Problem 7

Direction for questions: State whether the following statements are true or false. In iron, the differentiating electron enters into the orbital of a penultimate shell.

Short Answer

Expert verified
Answer: True

Step by step solution

01

Write the electronic configuration of iron

Iron has an atomic number of 26, which means it has 26 electrons. We can determine the electronic configuration by filling the orbitals in the increasing order of their energies. The electronic configuration of iron is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶.
02

Identify the differentiating electron in iron

In the electronic configuration of iron, we can identify the differentiating electron as the last electron added to complete the configuration, which is the 26th electron. In the case of iron, it is entered into the 3d orbital.
03

Check if the differentiating electron enters the penultimate shell

In the electronic configuration, 4s² 3d⁶, the penultimate shell is the third shell (n = 3), which includes orbitals 3s, 3p, and 3d. Since the differentiating electron of iron enters the 3d orbital, it indeed enters the penultimate shell.
04

State whether the statement is true or false

As observed in the electronic configuration of iron, the differentiating electron enters into the orbital of the penultimate shell. Therefore, the statement is True.

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