15-First Ionization Energy: Phosphorus vs Sulfur | AP Chemistry | IB Chemistry |General Chemistry
Автор: Chemistry by Dr. Salih
Загружено: 2026-02-28
Просмотров: 28
Описание:
In this video, we solve a multiple-choice question comparing the first ionization energies of phosphorus (P) and sulfur (S). Although ionization energy generally increases across a period, this question highlights an important exception caused by electron pairing and sublevel stability.
We analyze:
Electron configurations of phosphorus and sulfur
The stability of half-filled p sublevels
The effect of electron–electron repulsion on ionization energy
How to eliminate incorrect answer choices using periodic trends
This type of question frequently appears in AP Chemistry, IB Chemistry (SL & HL), and other international exams.
Perfect for students who want to master ionization energy trends and exceptions with clear exam-style reasoning.
Keywords / Tags:
ionization energy
first ionization energy
phosphorus vs sulfur
ionization energy exceptions
electron configuration
half-filled sublevel
paired electrons
periodic trends
AP Chemistry
IB Chemistry
IB Chemistry SL
IB Chemistry HL
multiple choice chemistry questions
exam-style chemistry questions
p-block elements
periodic table trends
chemistry concept traps
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