How many electrons in an atom can be described by the quantum number \( n=3 \) ?
number of electrons: \( \square \)
How many electrons in an atom can be described by the quantum numbers \( n=2, \ell=1 \) ?
number of electrons: \( \square \)
How many electrons in an atom can be described by the quantum numbers \( n=3, \ell=2, m_{\ell}=2 \) ?
number of electrons: \( \square \)