which diagram shows the correct electron configuration for fluorine (f)?

Question

Accepted Answer

# Brief Explanations:
1. First, recall the electron configuration of fluorine (F). The atomic number of F is 9, so it has 9 electrons.
2. The electron configuration follows the Aufbau principle, Pauli exclusion principle, and Hund's rule.
   - The $1s$ orbital can hold 2 electrons (paired, $\uparrow\downarrow$).
   - The $2s$ orbital can hold 2 electrons (paired, $\uparrow\downarrow$).
   - The $2p$ orbital has 3 sub - orbitals. For 5 electrons in $2p$ (since $1s^22s^22p^5$), according to Hund's rule, electrons fill orbitals singly first with parallel spins, then pair up. So in $2p$, we have two paired electrons (in two of the $2p$ sub - orbitals) and one unpaired electron (in the third $2p$ sub - orbital).
   - Looking at the options:
     - The first option has $1s$ ($\uparrow\downarrow$), $2s$ ($\uparrow\downarrow$), and $2p$ with two paired ($\uparrow\downarrow$) and one unpaired ($\uparrow$) electrons, which matches the electron configuration of F ($1s^22s^22p^5$).
     - The second option violates Hund's rule as electrons are paired in a $2p$ sub - orbital before all sub - orbitals have one electron.
     - The third option violates the Pauli exclusion principle (more than 2 electrons in $1s$ and $2s$ orbitals) and also the correct filling order.
# Answer: The first option (with $1s$ $\uparrow\downarrow$, $2s$ $\uparrow\downarrow$, and $2p$ with two $\uparrow\downarrow$ and one $\uparrow$ electrons)

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Answer: