Explain the quantum model and how Niels Bohr determined the principal and angular quantum numbers. Be prepared to provide this information for an element in rows 1 - 5.

Question

what information I’m I supposed to give, the orbital for an element, the atomic number, the amount of electrons protons and neutrons in an element? It’s not specific on the type of information I’m supposed to be prepared for when I talk about a given element

Answer 1

Hi Emily G.,

Let's assume that you are only required to do this for the valence orbit electrons? You should be familiar with the designations n, l, m, and s and how they are applied. If in doubt, look up "quantum number chart".

Otherwise, first shell n=1 l=0; 2nd shell n=2, l=0,1 ; 3rd shell n=3 l=0, 1, 2 and so on. Until you get to your desired valence row.

Oh yes, there are various effects which make certain suborbitals disturb the primary quantum number orderings, and also even more subtle effects about half-filling a suborbital -- but I'm sure you appreciate that whole thing by now. Just wait 'till you find out about even more disturbance by ions surrounding a central ion of interest (ligand field theory)!

-- Cheers, --Mr. d.