## Chemistry and Chemical Reactivity (9th Edition)

Rules for quantum numbers: 1. $0\leq\ell\leq n-1$ 2. $-\ell\leq m_\ell\leq \ell$ 3. $m_s=\pm 1/2$ By definition: $4p\rightarrow n=4, \ell=1$ Valid $(n,\ell,m_\ell, m_s)$ sets: (4,1,-1,-1/2),(4,1,-1,+1/2), (4,1,0,-1/2),(4,1,0,+1/2), (4,1,+1,-1/2),(4,1,+1,+1/2)