## Chemistry and Chemical Reactivity (9th Edition)

a) From definition: $0\leq\ell\leq n-1$ so 0, 1, 2 and 3. b) From definition $-\ell\leq m_\ell\leq \ell$ so -2, -1, 0, 1 and 2. c) 4s means $n=4, \ell=0$, hence $m_\ell=0$ d) 4f means $n=4, \ell=3$, hence $-3\leq m_\ell \leq 3$