= (19/12)/(11/4) =19/12 * 4/11 =19/3 * 1/11 =19/33
3 1/10 then to simplify it 31/10
1/10
1/10 cant be simplified further.
5/10 = 1/2
13 and 1/10
5 to 10 = 1 to 2
Potassium: [Ar] 4s^1 Chromium: [Ar] 4s^1 3d^5 Copper: [Ar] 4s^1 3d^10
1/5
1/7
33
It is 1 8/10 which you can simplify, if required.