Write orbital diagrams (boxes with arrows in them) to represent the electron configuration of ca

Write orbital diagrams (boxes with arrows in them) to...

Key Concepts

sp³ Hybridization

sp³ hybridization specifically involves the combination of one s orbital and three p orbitals to form four equivalent hybrid orbitals. This type of hybridization is key in explaining tetrahedral molecular geometries, particularly in carbon-containing compounds.

Spin and the Pauli Exclusion Principle

This concept involves the property of electron spin, represented by arrows in orbital diagrams, where no two electrons in the same orbital can have the same spin. This principle is crucial for accurately depicting electron arrangements and understanding magnetic properties.

Hybridization

Hybridization is the process of mixing atomic orbitals to form new, equivalent hybrid orbitals that can bond more effectively. It provides an explanation for the observed shapes and bonding properties of molecules.

Electron Configuration

Electron configuration explains how electrons are distributed among the various atomic orbitals in an atom. It describes the occupancy of electrons in different energy levels and sublevels, following rules such as the Aufbau principle, Hund’s rule, and the Pauli exclusion principle.

Orbital Diagrams

Orbital diagrams are visual representations of the electron configuration of an atom, using boxes for orbitals and arrows for electrons. They help illustrate the arrangement of electrons, including their spins, which is essential for understanding chemical behavior and bonding.

Transcript

00:01 Okay, so this question is asking us to write electron orbital diagrams for carbon before and after sp3 hybridization.

00:14 So what i have drawn here is i have drawn an axis that represents energy, which i have symbolized with an e.

00:23 And then i have drawn sort of our basic atomic electron orbitals that since you're learning about hybridization, i'm going to assume that you are at least somewhat familiar with these and have worked with them before.

00:42 So for the electron orbital diagram for carbon, before hybridization, we are going to fill these as we normally would.

00:53 So carbon has six total electrons.

00:57 So we're going to put two of these of opposite spin in the 1s orbital.

01:04 And we are going to then fill the next highest energy orbital, which is the 2s orbital.

01:11 And again, spin up, spin down, opposite spin electrons.

01:17 And then when we get to the 2p orbitals, we are going to fill, we are going to put one electron in the 2px orbital that is spin up and then we are going to put another electron in the 2 p y orbital notice that these don't pair up and that is because of hunn's rule which states that electron orbitals will be um singly occupied before the electrons will want to pair up.

01:56 So that is the case for electron orbitals that are the same energy just like these two p orbitals.

02:03 So that's the electron configuration for carbon before any hybridization occurs.

02:12 So we can see from this that we have the valence electrons of carbon right here.

02:22 We have two electrons in the 2s and 2 in the 2p.

02:28 And if we just sort of look at this without any knowledge of how carbon actually behaves, we might think that carbon could form two bonds because it has two places where electrons could go right here and right here, or two covalent bonds.

02:54 But we know that actually carbon forms four covalent bonds.

03:01 And so the way we can represent that and the way we can explain that is through hybridization.

03:09 So the first thing that we are going to do is we are going to take an electron from the 2s and we are going to promote it to the 2pz orbital like so.

03:23 And so i'm going to erase the electron in the 2s, and maybe we'll make this electron in red, actually, just so that we know that this has been promoted.

03:39 And we can see now that carbon is in what we call an excited state.

03:44 We've put energy in so that an electron is now promoted to the 2bz...

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