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Basic Configurations
Working Backward
D-block Configurations
GrabBag Configurations
Miscellaneous
100
What is the electron configuration for H?
1s1
100
What element has the electron configuration: 1s2 2s2 2p4 ?
Oxygen (O)
100
Write the electron configuration for scandium.
1s2 2s2 2p6 3s2 3p6 4s2 3d1
100
What is the electron configuration for He?
1s2
100
Write the electron configuration for B. How many electrons are in the highest energy level for Boron?
3
200
What is the electron configuration for carbon?
1s2 2s2 2p2
200
What element has the electron configuration: 1s2 2s2 2p6 3s2 3p6 4s1 ?
Potassium (K)
200
What is the electron configuration for Fe?
1s2 2s2 2p6 3s2 3p6 4s2 3d6
200
What is the electron configuration for Al?
1s2 2s2 2p6 3s2 3p1
200
What orbital is filled after 4s?
3d
300
Give the electron configuration for Ne.
1s2 2s2 2p6
300
What element has the electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5 ?
Bromine (Br)
300
What is the electron configuration for Zn?
1s2 2s2 2p6 3s2 3p6 4s2 3d10
300
What is the electron configuration for S?
1s2 2s2 2p6 3s2 3p4
300
Write the electron configuration for P. How many electrons are in the highest energy level?
5
400
What is the electron configuration for Na?
1s2 2s2 2p6 3s1
400
What element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 ?
Krypton (Kr)
400
What is the electron configuration for Zr?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d2
400
Write the electron configuration for Cu?
1s2 2s2 2p6 3s2 3p6 4s2 3d9
400
What rule tells us: to "start at the lowest energy level and build up to the higher energy levels only after the lowest are filled."
Aufbau principle
500
Give the electron configuration for Cl.
1s2 2s2 2p6 3s2 3p5
500
What element has the electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 ?
Strontium (Sr)
500
Write the electron configuration for Ag?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d9
500
What is the electron configuration for cadmium?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10
500
What rule states that: "each p orbital must receive one electron before any p orbital can receive a second filling electron."
Hund's rule