Inorganic · Main Group / p-Block
Main Group / p-Block Chemistry
Exam-focused revision notes on Main Group / p-Block Chemistry for CSIR-NET Chemical Sciences, GATE Chemistry and IIT-JAM — the core concepts, the formulas worth memorising, the traps that cost marks, and a quick-recall table.
Periodic trends across the p-block
Going down groups 13–15, the heavier elements increasingly favour an oxidation state two units lower than the group valence, because the ns2 pair becomes reluctant to participate in bonding.
What this note covers
- 1Periodic trends across the p-block
- 2Inert-pair effect
- 3Diagonal relationship
- 4Noble-gas compounds & shapes
- 5Interhalogens (VSEPR shapes)
- 6Oxoacids — relative strengths
- 7Boron hydrides & diborane
- 8Back-bonding & Lewis acidity of BX3
- 9Allotropes (quick recall)
- 10Common traps students miss
- 1130-second recall table
Read the full note
The remaining 10 sections — including the worked examples, the common-traps list and the quick-recall table — are part of ChemVidya Full Access, along with 6,000+ practice questions.
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