객관식
Which of the following represents the correct ground-state electron configuration for a neutral nitrogen atom?
102
views
10. Periodic Properties of the Elements
The Electron Configuration
객관식
Which of the following best describes an orbital diagram for the electron configuration of nitrogen (atomic number 7)?
A
Only one arrow in each box, with no pairing in 1s or 2s
B
Three arrows pointing up in three separate 2p boxes, with paired arrows in 1s and 2s boxes
C
Six arrows in the 2p boxes, all paired
D
All arrows paired in each box, including the 2p boxes
검증된 단계별 안내1
Recall that nitrogen has an atomic number of 7, meaning it has 7 electrons to place in orbitals according to the Aufbau principle.
Start filling the orbitals in order of increasing energy: 1s, 2s, then 2p. The 1s orbital can hold 2 electrons, the 2s orbital can hold 2 electrons, and the 2p orbitals can hold up to 6 electrons.
Place 2 electrons in the 1s orbital, both paired with opposite spins, since it can hold a maximum of 2 electrons.
Place 2 electrons in the 2s orbital, also paired with opposite spins, filling it completely.
Distribute the remaining 3 electrons among the three 2p orbitals. According to Hund's rule, place one electron in each 2p orbital with parallel spins (all arrows pointing up) before any pairing occurs.
관련 영상
관련 실천
