Please help (: What Argon atom has the following orbital-filling diagram (Figure 1) ?

Question

anonymous · Answer

Here is the diagram

chmvijay · Answer

its p block element it should have completely filled p orbits by electrons

anonymous · Answer

That's what  I thought, but its an actual question, which atom has that orbital filling diagram... Anyone?

aaronq · Answer

It's not an argon atom

[Ar] is short notation for: $1s^22s^22p^63s^23p^6$

anonymous · Answer

oh.... yikes. then what is it?

anonymous · Answer

potassium?

aaronq · Answer

look at the electron count. It has 1 electron in the $4p_x$ orbital, so it must be in the p block (in period 4).

anonymous · Answer

wow... yup. Looks like it was Gallium.  Maybe I should have read the textbook first?  Ha ha Thanks guys

aaronq · Answer

It is gallium. That would be a good idea. lol