Question

which statement describes the 3d, 4s, and 4p orbitals of arsenic (as) based on its electronic configuration and position in the periodic table?
the 3d and 4s orbitals are completely filled, and the 4p orbital is partially filled.
the 3d orbital is completely filled, and the 4s and 4p orbitals are partially filled.
the 3d, 4s, and 4p orbitals are completely filled.
the 3d, 4s, and 4p orbitals are partially filled.

Explanation:

Arsenic (As) has an atomic number of 33. Its electron configuration is \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{3}\). The 3d orbital can hold a maximum of 10 electrons (completely filled as there are 10 electrons in 3d), the 4s orbital can hold a maximum of 2 electrons (completely filled as there are 2 electrons in 4s), and the 4p orbital can hold a maximum of 6 electrons (partially filled as there are 3 electrons in 4p).

Answer:

The 3d and 4s orbitals are completely filled, and the 4p orbital is partially filled.