Question

which period can have33 electrons​

Answer 1

Answer:

According to Aufbau's principle, electrons are added to different orbitals in order of their increasing energies. The energy of the 6d subshell is even higher than that of the 7s subshell. In the 6th period, electrons can be filled in only 6s, 4f, 5d, and 6 p subshells.