Chemistry Practice Problems Paramagnetic and Diamagnetic Practice Problems Solution: The electron configuration of Gd is [Xe]4f75d16s2....

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Solution: The electron configuration of Gd is [Xe]4f75d16s2. How many unpaired electrons are in this atom?A. 1B. 2C. 7D. 8E. 9

Problem

The electron configuration of Gd is [Xe]4f75d16s2. How many unpaired electrons are in this atom?

A. 1

B. 2

C. 7

D. 8

E. 9

Solution

We are being asked how many unpaired electrons are present in the atom Gadolinium (Gd). Let’s take a look at the electron configuration given for Gd.

Gd:      [Xe]4f75d16s2


To find the number of unpaired electrons, fill up the 4f, 3d, and 6s subshells of Gd. All of the electrons in lower energy orbitals are paired.

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