2 of 21

Wave Model (modern definition)

- small, positively charged nucleus surrounded by a large region in which there are enough electrons to make the atom neutral.

3 of 21

Electron Configuration = form of notation which shows how electrons are distributed in an atom.

Ex: Helium

1s²

Principle Quantum Number (n)

Sublevel

# of electrons

Principle Quantum Number (n) = energy level.

n = 1, 2, 3, 4, etc…

Energy Level 1

n = 1

Energy Level 2

n = 2

Energy Level 3

n = 3

The average distance of electrons from nucleus increases as n increases.

Sublevel = spaces within each principle energy level that electrons occupy.

- the number of sublevels an energy level can contain is EQUAL to the principle quantum number (n) of that energy level.

- types = sharp (s), principal (p), diffuse (d), fundamental (f)

Sublevel = spaces within each principal energy level that electrons occupy.

- the number of sublevels an energy level can contain is EQUAL to the principle quantum number (n) of that energy level.

- types = sharp (s), principal (p), diffuse (d), fundamental (f)

Sublevel = spaces within each principal energy level that electrons occupy.

- the number of sublevels an energy level can contain is EQUAL to the principle quantum number (n) of that energy level.

- types = sharp (s), principal (p), diffuse (d), fundamental (f)

Sublevel = spaces within each principal energy level that electrons occupy.

- the number of sublevels an energy level can contain is EQUAL to the principle quantum number (n) of that energy level.

- types = sharp (s), principal (p), diffuse (d), fundamental (f)

Sublevel = spaces within each principal energy level that electrons occupy.

- the number of sublevels an energy level can contain is EQUAL to the principle quantum number (n) of that energy level.

- types = sharp (s), principal (p), diffuse (d), fundamental (f)

Orbitals = space that can be occupied by up to 2 electrons.