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