sigma composition

[Stephen Sirmay 1I]

When writing the composition of a sigma bond, I understand that you write the atom involved in the bind, the hybridization according to the number of electron density around that atom, and include the number associated with the period of that element. For example, sigma( C 2sp2, ...). However if we needed to write the composition of an atom that has valence electrons in the D block, what would the composition look like?

[Olivia L 4E]

Keep in mind that when determining the orbital hybridization, you are focusing on the number of electron densities. This where the d oribital will come into play (for octahedrons and square pyramidals). If this is the case, then the composition will be (ELEMENT 2sp3d2, ...).

[SydBenedict2H]

When it goes down a period does it get to 3SP^3 ever? We only did examples in class that were in the second period so I'm a tad confused.