Electron Configuration and Orbital Filling Rules Quiz

Test your knowledge on electron configurations & orbital filling rules with questions like carbon's config, highest energy sublevel, d sublevel electrons & more!

#1

What is the electron configuration of carbon?

1s2 2s2 2p2
1s2 2s2 2p4
1s2 2s1 2p3
1s2 2s2 2p6
#2

Which sublevel has the highest energy?

2p
3s
3d
4s
#3

What is the electron configuration of a phosphorus atom?

1s2 2s2 2p6 3s2 3p3
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p4
1s2 2s2 2p6 3s2 3p5
#4

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p3?

Sulfur (S)
Bromine (Br)
Iodine (I)
Tellurium (Te)
#5

What is the electron configuration of a sodium ion (Na^+)?

1s2 2s2 2p6
1s2 2s2 2p6 3s1
1s2 2s2 2p6 3s2
1s2 2s1 2p6
#6

Which of the following has the highest first ionization energy?

K (Potassium)
Ca (Calcium)
Ga (Gallium)
Ge (Germanium)
#7

How many electrons can the d sublevel hold?

2
6
10
14
#8

What is the electron configuration of the ion Ca^2+?

1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3p8
1s2 2s2 2p6 3s2 3p6 4s1
1s2 2s2 2p6 3s2 3p6 4s2
#9

How many unpaired electrons are there in an atom with the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d7?

0
1
2
3
#10

What is the electron configuration of the ion Fe^3+?

1s2 2s2 2p6 3s2 3p6 3d5
1s2 2s2 2p6 3s2 3p6 3d6
1s2 2s2 2p6 3s2 3p6 3d3
1s2 2s2 2p6 3s2 3p6 3d8
#11

How many electrons can the f sublevel hold?

2
6
10
14
#12

What is the electron configuration of the ion Ag^+?

1s2 2s2 2p6 3s2 3p6 3d10
1s2 2s2 2p6 3s2 3p6 3d9
1s2 2s2 2p6 3s2 3p6 3d8
1s2 2s2 2p6 3s2 3p6 3d10 4s1
#13

What is the electron configuration of a chromium atom?

1s2 2s2 2p6 3s2 3p6 4s1 3d5
1s2 2s2 2p6 3s2 3p6 4s2 3d4
1s2 2s2 2p6 3s2 3p6 4s2 3d5
1s2 2s2 2p6 3s2 3p6 4s1 3d10
#14

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1 3d10?

Zinc (Zn)
Copper (Cu)
Nickel (Ni)
Silver (Ag)
#15

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d9?

Chromium (Cr)
Iron (Fe)
Cobalt (Co)
Nickel (Ni)
#16

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s1?

Copper (Cu)
Zinc (Zn)
Gallium (Ga)
Silver (Ag)
#17

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s1?

Rb (Rubidium)
Sr (Strontium)
Y (Yttrium)
Zr (Zirconium)

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