electron configuration of tungsten

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CaminaB_1D
Posts: 63
Joined: Fri Sep 28, 2018 12:16 am

electron configuration of tungsten

Postby CaminaB_1D » Sun Oct 28, 2018 8:01 pm

Can someone please explain to me how to get the electron configuration of Tungsten[W]? I know what the answer is but I just do not know how to get there

Julia Go 2L
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Joined: Sun Sep 30, 2018 12:17 am
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Re: electron configuration of tungsten

Postby Julia Go 2L » Sun Oct 28, 2018 9:01 pm

First, we need to find the closest noble gas on the periodic table to tungsten, which is: Xenon (Xe)

So, the first part of the electron configuration is : [Xe]

Since tungsten's atomic number is 74 and xenon's atomic number is 54:

74-54= 20 electrons

There are 20 more electrons to fill. Note Xenon's electron configuration is: 1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 5s^2 5p^6

The next shell that we should choose to fill is the 6s orbital, which can take up to 2 electrons. (6s^2) Next, is the 4f subshell, which can take up to 14 electrons. (4f^14) Finally, we need to account for 4 more electrons so we move to the next subshell: 5d (5d^4)

Writing everything together, we get:

[Xe] 6s^2 4f^14 5d^4

Now, rewrite the electron configuration in order of energy (n value):

[Xe] 4f^14 5d^4 6s^2


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