Electron Structure Flashcards
What does the principle quantum number indicate?
The shell occupied by the electrons
What is a shell?
A group of orbitals with the same principle quantum number.
What is an orbital?
A region around the nucleus that can hold up to two electrons with opposite spins.
How many electrons can an orbital hold?
2
What are the 4 types of orbitals?
- s orbital
- p orbital
- d orbital
- f orbital
What is the shape of a s-orbital?
Spherical
What is the shape of a p-orbital?
Dumb-bell shape
How many orbitals are found in a S subshell?
1
How many electrons can be held in a S subshell?
2
How many orbitals are found in a F subshell?
7
How many electrons can fill F subshell?
14
What are the rules by which electrons are arranges in the shell? (5)
- Electrons are added one at a time
- Lowest available energy level is filled first
- Each energy level must be filled before the next one can fill
- Each orbital is filled singly before pairing
- 4s is filled before 3d
Why does 4s orbital fill before 3d orbital?
4s orbital has a lower energy than 3d before it is filled
Which electrons are lost when an atom becomes a positive ion?
Electrons in the highest energy levels.
