consider the orbitals shown below.\nwhich of these diagrams correctly shows the electron configuration for…
consider the orbitals shown below.\nwhich of these diagrams correctly shows the electron configuration for the atom with one more electron than the one shown above?
Answer
Explanation:
Step1: Recall Hund's rule
According to Hund's rule, electrons first fill degenerate orbitals singly with parallel spins before pairing up.
Step2: Analyze the given configuration
The given configuration has 2 electrons in 3s (fully - filled) and 2 unpaired electrons in 3p orbitals.
Step3: Add one more electron
When adding one more electron, it will go into the 3p orbital. Since there is an empty 3p orbital available, the new electron will occupy it with a spin parallel to the existing 3p electrons (following Hund's rule).
Answer:
(the second option in the multiple - choice where there are 3 unpaired electrons in 3p orbitals after adding one more electron to the given configuration)