Question

what is the maximum number of d orbitals in a principal energy level? 5 1 3 2

Explanation:

In atomic structure, for a given sub - shell (here, the d sub - shell), the number of orbitals is determined by the magnetic quantum number \(m_l\). For the d sub - shell, the angular quantum number \(l = 2\). The magnetic quantum number \(m_l\) can take values \(m_l=-l,-l + 1,\cdots,0,\cdots,l-1,l\). When \(l = 2\), \(m_l=-2,-1,0,1,2\). Each value of \(m_l\) corresponds to one orbital.

Answer:

5