Electron Configuration Practice Problems

What is the ground-state electron configuration for rhenium (Re)?

• [Xe]6s²4f¹⁴5d⁵

• [Kr]5s²4d¹⁰5p⁵

• [Ar]4s²3d¹⁰4p⁶

• [Ne]3s²3p⁶

When a sulfur atom reacts with other atoms, electrons in orbitals related to the atom’s third energy level are involved. How many such electrons does a sulfur atom have?

• 2

• 6

• 8

• 4

List the sequence in which the following orbitals fill up: 1s, 2s, 3s, 4s, 5s, 6s, 7s, 2p, 3p, 4p, 5p, 6p, 7p, 3d, 4d, 5d, 6d, 4f, 5f.

• 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p

• 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7p, 5f, 6d, 7s

• 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5d, 6d, 7p

• 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 6d, 5f, 7p

Identify the element with the electron configuration [Xe]6s²4f¹⁴5d¹⁰6p².

What is the electron-dot structure for potassium?

Complete the electron configuration for the element with the symbol 'F'.

• 1s²2s²2p⁵

• 1s²2s²2p⁶

• 1s²2s²2p⁴

Which of the following elements has the electron configuration 1s²2s²2p³?

• Nitrogen

• Oxygen

• Carbon

Fill in the blank: The electron configuration for carbon is ____.

• 1s²2s²2p²

• 1s²2s²2p³

• 1s²2s²2p⁴

Complete the following: The electron configuration for an element with a full 2p orbital is ____.

• 1s²2s²2p⁶

• 1s²2s²2p⁵

• 1s²2s²2p⁴

Which orbital is filled after 3d in the orbital diagram?

• 4p

• 4s

• 4d