Electron Configuration Flashcards
What are electrons arranged in.
Energy levels
Who proposed energy levels.
Bohr said that electrons could only exited in fixed energy levels.
What are the letters of each energy level and how many sub levels do these have.
1s
2s 2p
3s 3p 3d
4s 4p 4d 4f
What is the maximum number of electrons in each energy level type ?
S = 2 P = 6 D = 10 F = 14
What are orbitals ?
By measuring electron density around the nucleus it is possible to define regions where electrons are most likely to be found at any one time. These are orbitals.
What is the shape of an S orbital.
Sphere
What is the shape of a P orbital.
8
What is the aufball principle ?
The lowest energy sub-levels are occupied first.
When is electronic configuration odd in the way that the sub-levels are filled. And why is this.
3s 3p 4s 3d
4s is filled before 3D with a maximum of 2 electrons.
Because there is an overlap of energy.
What is different about Chromium (Cr) and Copper (Cu) and why ?
They fill the 4S energy sub-level with only one electron because it makes them more stable.
How is shorthand electron configuration used.
Use the noble gas (group 8) with the number of electrons that is below the one you have then add on the necessary sub-levels.
What is the rule when creating the electronic configuration of ions.
Calculate the new value of electrons.
The 4s looses electrons before the 3d so often you can have 4s0.
What is the electronic configuration of lithium ?
1S2 2S1
What is the electronic configuration of silicone ?
1S2 2S2 2P6 3S2 3P2
What is the electronic configuration of calcium ?
1s2 2s2 2p6 3s2 3p6 4s2
