Periodic Table 2.85

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Semi Yoon
Posts: 60
Joined: Fri Sep 28, 2018 12:27 am

Periodic Table 2.85

Postby Semi Yoon » Wed Oct 24, 2018 6:27 pm

In the heavier transition-metal elements, especially the lanthanoids and actinoids, there are numerous exceptions to the regular order of orbital occupation predicted by the building- up principle. Why would more exceptions would be noted for these elements?

Anushi Patel 1J
Posts: 61
Joined: Fri Sep 28, 2018 12:19 am
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Re: Periodic Table 2.85

Postby Anushi Patel 1J » Wed Oct 24, 2018 6:44 pm

Because as energy levels increase, the energy difference between one and the next decreases. This means there is less of a clear distinction between which subshell has a lower energy and therefore should be filled first.

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