The Electron Configuration (Simplified) Practice Problems

Identify the number of paired and unpaired electrons in the valence d subshell of i) Cd and ii) Co.

Consider the elements lutetium through mercury. Identify:
i) If the elements are nonmetals, metalloids, or metals.
ii) The class of elements they belong.
iii) The subshell being filled with electrons in the series.

Identify the rule (aufbau principle, Hund's rule, Pauli-Exclusion principle) violated by the following electron configurations.

i) Li     1s² 2p¹

ii) O    [He] 2s² 2p ↿↿  ↿   ↿ 

iii) P    [Ne] 3s² 3p ↿⇂  ↿     

Provide the orbital diagram for Te using its ground-state electron configuration.

Identify the element that has the following electron configuration: 1s²2s²2p⁶3s¹

What is the complete electron configuration of polonium (Po)?

Draw the atomic orbital diagram for sulfur.

For the orbital diagram below, write a full electron configuration. Assuming that the electron configuration describes a neutral atom, name the element.

Which of the following orbital choices exist?

1p, 2d, 3d, & 4f

Identify which has an incorrect ground-state electron configuration.