Electron Configurations

Working Backward

Noble Gas Configurations

Mixed Configurations

Miscellaneous

100

What is the electron configuration for H?

1s1

100

What element has the electron configuration: 1s2 2s2 2p4 ?

Oxygen (O)

100

What is the electron configuration for Fe?

[Ar] 4s2 3d6

100

What is the electron configuration for lithium

1s¹ 2s¹

100

What sublevel can hold 2 electrons?

The s sublevel

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 Zn?

[Ar] 4s2 3d10

200

Name the element with this configuration: 1s²2s²2p³

Nitrogen

200

What is filled after 4s?

300

Give the electron configuration for Iron.

1s2 2s2 2p6 3s2 3p6 4s2 3d6

300

What element has the electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5 ?

Bromine (Br)

300

What is the configuration for Cs?

[Xe] 6s¹

300

Name the element with this configuration: 1s²2s²2p⁶3s²3p¹

Aluminium

300

Which sublevel has more potential energy: 5p or 6s?

400

What is the electron configuration for Zr?

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d2

400

What element has the electron configuration [Xe] 6s² 4f¹⁴ 5d¹⁰ 6p²

Lead (Pb)

400

Write the electron configuration for Sn?

[Kr] 5s² 4d¹⁰ 5p²

400

Name the element with this configuration: [Ne]3s²3p⁵

Chlorine

400

What sublevel has 5 orbitals?

The d sublevel

500

Give the electron configuration for Ba.

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2

500

What element has the electron configuration: [Rn] 7s2 5f8?

Curium (Cm)

500

What is the electron configuration for Sg?

[Rn] 7s2 5f14 6d4

500

Name the element with this configuration: [Ar]4s²3d¹⁰4p³

Arsenic

500

Which sublevel has more potential energy: 3d or 4s?