Electronic Structure Flashcards
1
Q
What are energy levels?
A
Energy levels are another name for shells.
2
Q
Why are the lowest energy levels filled first?
A
Because they are the ones closest to the nucleus.
3
Q
How many electrons can go in the 1st shell?
A
Only 2 can go in the first shell.
4
Q
How many electrons can go in the other shells?
A
In the other shells 8 is the maximum number of electrons that can go into them.
5
Q
How can you work out the electronic structure of Aluminium?
A
You look at the atomic number and remember that the number of protons=number of electrons. The atomic number of Aluminium is 13 so it must have 13 electrons. 2 go into the first shell. Then 8 goes into the second shell. Now you have 3 left in the third and last shell. Therefore the electronic structure of Aluminium is 2,8,3.
