Quantum Numbers

How many quantum numbers are there?

4

What are the quantum numbers?

n, l, m, s

What is the Pauli Exclusion Principle?

No two electrons share the same quantum numbers

What is the principal quantum number (n)?

Principal electron shell (n=1.2.3.4…)

What is the orbital angular momentum quantum number (l)?

The shape of the orbital, (l=0,1,2,3…(n-1))

What is the magnetic quantum number (m)?

The number of orbitals and their orientation within a subshell (m=-l to +l)

What is the electron spin atomic number (s)?

The direction of the electron spin (s=±1/2)

As n increases, what happens to atomic radius size?

Increases

As n increases, what happens to ionization energy (energy to release electrons)?

Decreases

What is the subshell name for a l value of 0?

s subshell

What is the subshell name for a l value of 1?

p subshell

What is the subshell name for a l value of 2?

d subshell

What is the subshell name for a l value of 3?

f subshell

What is Hund’s Rule?

Electrons fill orbitals one at a time

What is the Heisenberg Uncertainty Principle?

We cannot precisely measure the momentum and position of an electron at the same time