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Valence Electrons for d-Block Elements?

Posted: Thu Jun 07, 2018 10:49 am
by KC Navarro_1H
For all elements in the d-block, do you also include the s orbital to determine valence electrons? In general, should we determine number of valence electrons from the shorthand version of the electron configuration?

Re: Valence Electrons for d-Block Elements?

Posted: Thu Jun 07, 2018 6:50 pm
by danielruiz1G
for transition metals on the periodic table, they cant be assigned traditional valence electrons like the rest of the table according to the group, but in the d block it ranges from group 3 to 12 and all but group 3 that has 3 valence e-, can have a different number of valence e- depending on the situation. for example
group 4 can have from 2 to 4 valence electrons, group 5 can have 2 to 5 valence electrons, group 6 can have 2 to 6 valence electrons, group 7 can have 2 to 7 valence electrons, group 8 can have 2 or 3 valence electrons, group 9 can have 2 or 3 valence electrons, group 10 can have 2 or 3 valence electrons, group 11 can have 1 or 2 valence electrons,and group 12 can have 2 valence electrons.

Re: Valence Electrons for d-Block Elements?

Posted: Fri Jun 08, 2018 4:40 pm
by KC Navarro_1H
danielruiz1G wrote:for transition metals on the periodic table, they cant be assigned traditional valence electrons like the rest of the table according to the group, but in the d block it ranges from group 3 to 12 and all but group 3 that has 3 valence e-, can have a different number of valence e- depending on the situation. for example
group 4 can have from 2 to 4 valence electrons, group 5 can have 2 to 5 valence electrons, group 6 can have 2 to 6 valence electrons, group 7 can have 2 to 7 valence electrons, group 8 can have 2 or 3 valence electrons, group 9 can have 2 or 3 valence electrons, group 10 can have 2 or 3 valence electrons, group 11 can have 1 or 2 valence electrons,and group 12 can have 2 valence electrons.


Thank you! By depending on the situation, do you mean that you might need to get more valence electrons to fill an octet?