Part A What is the electron configuration for the Co atom? Use the buttons at th

Question

Part A

What is the electron configuration for the Co atom?

Use the buttons at the top of the tool to add orbitals in order of increasing energy, starting at the bottom with the lowest energy orbitals. Click within an orbital to add electrons.

Part B

What is the electron configuration for the Co3+ ion?

Use the buttons at the top of the tool to add orbitals in order of increasing energy, starting at the bottom with the lowest energy orbitals. Click within an orbital to add electrons.

Part C

How many unpaired electrons does each possess?

Express your answers as integers separated by a comma.

Explanation / Answer

First, identify the Atomic Number

n = 27

therefore, e = 27 electrons

Argon = 18 electrons

[Ar] 3d7 4s2

Full:

1s2 2s2 2p6 3s2 3p6  3d7 4s2

B)

For Co3+. it has lost 3 electrons so:

We need to note that we have to subshells, d, s free

recall that we require certain energy criteri ( Aufbau principle)

so

[Ar] 3d7 4s2

Note that subshells can contain, d = 10, electrons, so we fill first 5 electrons, then fill the next shell available 4s as follows:

[Ar] 3d5 4s1

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