This document discusses atomic orbitals and the order in which they are filled with electrons. It provides information on s, p, and d orbitals, including the number of electrons that can occupy each type of orbital. The document asks the reader to write the electronic configurations for several elements: Na, Cl, Mg, Ar, Al, Si, P, and S.

1. Atomic orbital: A region
around the nucleus where
there is a high probability of
finding an electron

2. Types of orbitals
s-orbital p-orbital d-orbital
2 electrons 6 electrons 10 electrons

3. Order in which it is
filled

5. Write the electronic
configuration of the following
• Na • Cl
• Mg • Ar
• Al
• Si
• P
• S