Posted: May 25, 2016 7:51 pm
by LjSpike
Every other element in the transition metals has either 1, or 2 electrons in its outer shell, and on period 5, where Palladium is, all the elements have 5 electron shells, except palladium, which has 4.
Why is palladium the 1 exception, to this beautiful neat pattern?

Then, Nickel, 1 or 2 electrons in its outer shell? How does this work then? Its the only element which does this (as far as I know)!

(Additionally if anyone wishes to answer, why is it a bit 'random', where the electrons go in the transition metals, for example iridium has 2 electrons in its outer shell, bu then platinum and gold have 1 in the outer shell, then mercury has 2 again in the outer shell?)
:?