ELECTRON STRUCTURE (OCR) Flashcards
What are electron shells/energy level numbers called?
Principal Quantum Numbers (n)
What are electron shells/energy levels made of?
Atomic Orbitals
How many electrons can each atomic orbitals hold?
Two each ((with opposite spin))
What are the different atomic orbital letters?
s, p, d, and f.
What shape is an S orbital?
Sphere
What shape is a P orbital?
Dumbbell/bow shaped
What are subshells?
Groups of orbitals of the same type.
What are the maximum electrons that can be held in the first subshell?
Two
What are the maximum electrons that can be held in the second subshell?
Eight
What are the maximum electrons that can be held in the third shell?
Eighteen
What are the maximum electrons that can be held in the fourth shell?
Thirty-two
How do orbitals fill?
In order of increasing energy singly before pairing.
What is the electron configuration of Helium?
1s2
What are positive ions called?
Cations
What are negative ions called?
Anions
How is the periodic table divided? (in terms of highest subshell energy))
First two groups- S-block
Right block of six groups - P-block
Centre block of ten groups - D-block
In terms of the 4s sub-shell and 3d sub-shell which fill/empty first?
The 4s subshell
