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Chapter 8: Problem 61

Write the electron configuration for iron.

Short Answer

Expert verified
The electron configuration for iron (Fe) is: \(1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^6\)

Step by step solution

01

Determine the atomic number of iron

The atomic number of iron (Fe) is 26, which means there are 26 electrons in an iron atom.
02

Determine the energy levels, subshells, and orbitals

The order in which electrons are placed in orbitals is based on the increasing energy levels of the subshells (s, p, d, and f). Here is the order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p
03

Fill the orbitals according to the Aufbau principle

Start filling the orbitals with the 26 electrons of iron, following the order given above. The maximum number of electrons for each subshell is: s (2), p (6), d (10), and f (14). 1s: 2 electrons (2/2) 2s: 2 electrons (4/2) 2p: 6 electrons (10/6) 3s: 2 electrons (12/2) 3p: 6 electrons (18/6) 4s: 2 electrons (20/2) 3d: 6 electrons (26/10), because we're only adding 6 electrons to reach 26 After filling all the orbitals, write the electron configuration.
04

Write the electron configuration for iron

The electron configuration for iron (Fe) is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶

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Most popular questions from this chapter

For \(n=1,\) write all the possible sets of quantum numbers \(\left(n, l, m, m_{s}\right)\).

(a) If one subshell of an atom has nine electrons in it, what is the minimum value of \(l\) ? (b) What is the spectroscopic notation for this atom, if this subshell is part of the \(n=3\) shell?

Find the minimum torque magnitude \(| \vec{\tau}\) | that acts on the orbital magnetic dipole of a \(3 p\) electron in an external magnetic field of \(2.50 \times 10^{-3} \mathrm{T}\)

For a hydrogen atom in an excited state with principal quantum number \(n,\) show that the smallest angle that the orbital angular momentum vector can make with respect to the \(z\) -axis is \(\theta=\cos ^{-1}(\sqrt{\frac{n-1}{n}})\).

What, if any, constraints does a value of \(m=1\) place on the other quantum numbers for an electron in an atom?
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