Electronic Configuration Flashcards
1
Q
AUFBAU PRINCIPLE
A
- orbitals are filled singly first then paired
- lower energy levels filled first then higher energy levels
- ‘last in, first out’ rule however 4s is lost before 3d
2
Q
What happens when two electrons are in the same orbital?
A
- negative charges repel each other in orbital
- causes the electrons to spin
- electrons must spin in opposite directions to minimise repulsion
3
Q
What are key facts about s orbitals?
A
- spherical shape
- one occurs in every principal energy level
- Amount of orbitals=1
- Amount of electrons=2
3
Q
What are key facts about p orbitals?
A
- 3D dumb-bell shape
- three occur in energy levels except the first
- Amount of orbitals=3
- Amount of electrons=6
4
Q
What are electrons considered to be?
A
A cloud of negative charge
5
Q
What does ‘orbital’ mean?
A
A region of space where electrons may be found
7
Q
What is the maximum electrons per shell?
A
1st shell-2 2nd shell-8 3rd shell-18 4th shell-32 5th shell-50
7
Q
How much electrons can a orbital hold?
A
Up to two electrons with opposite spins
9
Q
What are key facts about d orbitals?
A
Various shapes
- 5 occur in every energy levels except first and second
- Amount of orbitals=5
- Amount of electrons=10
