Spin up or down answer this next me 1s now have two

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: configura;ons according to Pauli exclusion principle. Ground state He has its spins paired up, so we say it has a closed shell. Lithium (Z=3) Valence electron 2s 1s 2p The configura;on for ground state Li is 1s22s ! =1 Closed shell and lying closer to nucleus Core electrons only par;ally screen nucleus for valence (ℓ=0, so no centripetal term) The effec;ve charge is empirically found from the ioniza;on energy as Zeff~1.26 < 3 Beryllium (Z=4) 3s 2p...
View Full Document

This document was uploaded on 02/04/2014.

Ask a homework question - tutors are online