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The electronic configuration of cobalt is :1s2 2s2 2p6 3s2 3p6 3d7 4s2

This is so because cobalt has an atomic no of 27. So it will have 27 electrons. The 1st shell can accommodate a maximum of 2 electrons, the 2nd shell can accomodate 8. So that makes it 10, 17 to go.

Now the 3s and 3p subshells get filled up with 2 and 6 electrons respectively, but after that instead of the 3d subshell, the 4s subshell gets filled up.(This is so because the 4s subshell has a lower energy level than 3d).So that makes it 20 electrons. The remaining 7 proceed into the 3d subshell to make a total of 27.

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13y ago
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14y ago

The element cobalt has atomic number 27 and the electron configuration

[Ar]3d74s2

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Wiki User

12y ago

Z (atomic number) = 27 Cobalt Co

1s2 2s2 2p6 3s2 3p6 4s2 3d7 or

[Ar] 4s2 3d7

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13y ago

Electron configuration of cobalt: [Ar] 4s2 3d7.

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11y ago

[Ar] 4s2, 3d7

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14y ago

[Ar]4s^2,3d^7

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12y ago

1s2 2s2 2p6 3s2 3p6 4s2 3d7

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12y ago

[Ar]3d74s2

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9y ago

[Ar]3d^7

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Anonymous

Lvl 1
3y ago

4s2 3d7 if you are not supposed to add the core configuration.

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Q: What is complete electron configuration for an atom of cobalt?
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