Chemistry - PE Unit 4 Quantum Numbers

If you have the concept and it isn't exactly what it wants, just override it from being wrong.

What does the Principle Quantum Number tell you? What is the ___?

Tells how far an electron is from the nucleus. n

Explain the Principle Quantum Number

The larger the n, the further away the electron is from the nucleus, creating less attraction forces towards the nucleus. Outside electrons are likely to be the “bonding” electrons called valence electrons. (valence e-)

What is another thing that an energy level is called?

A shell

What does the Orbital Quantum Number tell you? What is the ___?

Describes the shape of the Orbital. Sublevels

What is the name of this?

s orbital

What is the name of this?

p orbital

What is the name of this?

d orbital

What is the name of this?

f orbital

What does Orientation Quantum Number tell you?

Describes how the Orbital is arranged/positioned in space

How many orientations does each orbital have? Write like s = #, p = #, etc.

s = 1, p = 3, d = 5, f = 7

What does Spin Quantum Number tell you?

Describes the direction the electron (e-) is spinning

Explain the Pauli Exclusion Principle

Only 2 electrons can be in the same orbital and they much have opposite spins

What do the Electron Configurations tell you?

Describes where all the electrons in an atom are located

Explain the Aufbau Principle

Electrons occupy the orbitals of lowest energy first

Explain the Hunds Rule

Electrons occupy the orbitals of the same energy with the same spin, until they have to double up

What would you write for a single electron?

Up arrow or down arrow (↑) or (↓)

What would you write for an electron pair?

A half up arrow and half down arrow (↑↓)

Practice being able to read short hand notation. What element is this: 1s²2s²2p⁶3s²3p³

Phosphorus