For Z=57, what is the element, and what is its electronic configuration?

1 Answer
Jul 5, 2017

Got a Periodic Table............?

Explanation:

I actually happen to know this one, because I did a lot of work with lanthanides, and actinides. Anyway, Z=57 SPECIFIES the element lanthanum. And thus the electronic configuration has an xenon core (Xe,Z=54), i.e. [Xe]5d16s2. Lanthanum usually adopts the +III oxidation state, i.e. {[Xe]}3+.....