electron configurations

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Caitlin_Murphy_3C
Posts: 36
Joined: Fri Sep 28, 2018 12:23 am

electron configurations

Postby Caitlin_Murphy_3C » Sat Oct 27, 2018 10:57 pm

when writing electron configurations, I get that you write out a noble gas core, then the valence electrons shown on the periodic table, (for example, the configuration for Fluorine is [He]2s^2,2p^2), but when it gets to the more complex elements like Bi and Pb, how do we know which orbitals needed to be added to complete the electron configuration. For example, in some of the exercises out of the book they add a 4d^10 (or something along those lines) to some of the e- configurations.

Abbey Brandt 1K
Posts: 33
Joined: Fri Sep 28, 2018 12:29 am

Re: electron configurations

Postby Abbey Brandt 1K » Sat Oct 27, 2018 11:57 pm

s, p, d, and f are all included in electron configurations when the element is in a certain position on the periodic table. The sum of the superscripts in an electron configuration is equal to the number of electrons in that atom, which is in turn equal to its atomic number. I would refer you to this video to help with the specifics of writing electron configurations for more complex elements!!!

https://www.khanacademy.org/science/che ... urations-2


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