Electron Structure Flashcards
What is the principal quantum number indicate
The shell occupied by the electrons
What is a a shell
A group of orbitals witht the same number of principal quantum number
How many electrons can the 1st shell hold
2
How many electrons can the 2nd shell hold
8
How many electrons can the 3rd shell hold
18
How many electrons can the 4th shell hold
32
How many electrons can an orbital hold
2
What is a orbital
A region around the nucleus that can hold up to two electrons with opposite spins
What is the shape of an S orbital
Spherical
What is the shape of a P orbital
Dumbell
Why does the 4s orbital fill before the 3d orbital
4s orbital has a lower energy than 3D before it is filled
What are the rules by which electrons are arranged in the shell
- 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 the pairing
- 4s Is filled before 3D
Which electrons are lost when an atom becomes a postive ion
Electrons in the highest energy levels
