How execute you identify the variety of core electrons in one atom? I've looked it up on google and am simply not expertise it. (Chem question)

For example, Cl- and K+ both have configurations that 3s2 3p6 and also 10 main point electrons. I just don't know just how to come up with that variety of ten on my own.

You are watching: How to find the number of core electrons

It's for a Zeff problem.

Thanks so much in advance!



Core are any non valence (outer) e-s, for this reason the 3 suggests the subshell and also we know that everything there is valence, and non core.

So those ions have actually filled octets or valences as shown by 3s2 and also 3p6

Core electrons are any non-valence electron (3 gift valence in this case), so in this instance the 1s2 2s2 2p6 would certainly be main point as they room not in the outermost (valence) shell

If the a zeff problem relating to atom radii, Cl- is larger than K+ due to having much more e-s and also thus more repulsion. K additionally has more protons which will draw the electrons tighter to the cell core decreasing atomic radii together well.

See more: What Is The Sum Of 6 Feet 10 Inches And 8 Feet 9 Inches? ? The Sum Of 6Ft 10 Inches And 8Ft 9 Inches

Hope the helps


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Op · 9y

Wow that is so straightforward and a an excellent explanation. Say thanks to you sooo much!


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· 9y

r/HomeworkHelp is most likely a much better place. Good luck!


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· 9y

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