Week 1

What do atomic orbitals arise from?

Quantum mechanics

What does quantized mean?

Can only take specific values and is not a continuum

What is quantum mechanics?

Field of chem that describes the behaviour of atoms and molecules and their e-

How are E quantized?

Into discrete packets

Discrete packets of light E are called what?

Photons

What is the Schrodinger equation for?

Equation of motion for particles that account for their wave-like properties

What is ‘wave particle duality’?

Light and matter exhibit wave-like and particle-like properties

How can light / waves be characterised?

In terms of amplitude / wavelength / frequency

What is the symbol for amplitude?

a

What is the symbol for frequency?

v 

What is it called when 2 waves ‘in phase’ adds together?

Constructive interference

What is constructive interference?

When 2 waves that are in phase, adds together

What is it called when 2 waves that are ‘out-of-phase’ tries to add together?

Destructive interference

In quantum mech, what is quantized?

E of a particle such as a photon or an e-

If an e- at position x,y,z - then how is the wavefunction written? (Ψ-symbols needed)

Ψ(x,y,z)

What is the prob. of being in a volume δV at position (x,y,z)?

[Ψ(x,y,z)]² δV

The prob. of finding an e- in a tiny region/volume δV depends on what?

Ψ² / wave function^ 2

What does the principal quantum number, n, describe?

The energy level

What do the orbital angular momentum number do?

Determines angular momentum, designates that subshell (shape of orbital)

What does the Magnetic Quantum Number do?

Designates the orbital orientation

What is the symbol for Orbital Angular Momentum?

l

What are all the quantum numbers needed to describe of orbital? Ψ copy

Ψ (n,l,m)

What does Ψ (n,l,m) describe?

An orbital

Between the 3 quantum numbers, used to describe orbitals, which 2 are related? (just give letters)

l and m

What is the value of l for an s-orbital?

0

What is the value of l for an p-orbital?

1

What is the value of l for an d-orbital?

2

What is the value of l for an f-orbital?

3

What are the quantum numbers for the 1s orbital? Ψ -copy

Ψ (1,0,0)