Question

electron configuration and orbital notation
instructions: complete the electron orbital diagram for each element below, and then write the electron configuration in full notation and noble gas notation (abbreviated).
example 1: nitrogen (n)
electron configuration:
electron configuration (abbreviated):
noble gas configuration (abbreviated):
example 2: fluorine (f)
electron configuration:
electron configuration (abbreviated):
noble gas configuration (abbreviated):

Explanation:

Step1: Recall electron - filling rules

Electrons fill orbitals in order of increasing energy (1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p etc.). The s - orbital can hold 2 electrons, p - orbitals can hold 6 electrons (3 sub - orbitals with 2 electrons each), and d - orbitals can hold 10 electrons (5 sub - orbitals with 2 electrons each).

Step2: Determine electrons for nitrogen

Nitrogen (N) has an atomic number of 7, so it has 7 electrons.

• The first 2 electrons go into the 1s orbital: 1s².
• The next 2 electrons go into the 2s orbital: 2s².
• The remaining 3 electrons go into the 2p orbital. According to Hund's rule, these 3 electrons will occupy separate 2p sub - orbitals with parallel spins. So the electron configuration of N is 1s²2s²2p³.
• The noble gas before nitrogen is helium (He). So the noble gas notation is [He]2s²2p³.

Step3: Determine electrons for fluorine

Fluorine (F) has an atomic number of 9, so it has 9 electrons.

• The first 2 electrons go into the 1s orbital: 1s².
• The next 2 electrons go into the 2s orbital: 2s².
• The remaining 5 electrons go into the 2p orbital. The electron configuration of F is 1s²2s²2p⁵.
• The noble gas before fluorine is helium (He). So the noble gas notation is [He]2s²2p⁵.

Answer:

For Nitrogen:
Electron Configuration: 1s²2s²2p³
Electron Configuration (abbreviated): 1s²2s²2p³
Noble Gas Configuration (abbreviated): [He]2s²2p³

For Fluorine:
Electron Configuration: 1s²2s²2p⁵
Electron Configuration (abbreviated): 1s²2s²2p⁵
Noble Gas Configuration (abbreviated): [He]2s²2p⁵