Chapter 4 · Comprehensive Revision
Representative Elements of Some Regular Groups
2 lessons · 114 total questions
Chapter Overview
This chapter explores the representative elements of some regular groups in the periodic table, covering s-block elements (alkali metals, alkaline earth metals) and p-block elements (nitrogen group, halogens, noble gases). Master the properties, reactions, and applications of these elements.
🗺️ Comprehensive Mind Map
🔬 Lesson 1: s-Block Elements
- • Alkali metals (Group 1A): Li, Na, K, Rb, Cs, Fr
- • Properties: soft, low melting point, vigorous reaction with water
- • Alkaline earth metals (Group 2A): Be, Mg, Ca, Sr, Ba
- • Flame test colours: Li=crimson, Na=yellow, K=pale violet, Ba=green
- • Compounds: oxides, peroxides, superoxides, nitrides
- • Photoelectric effect: Cs has lowest ionization energy
⚛️ Lesson 2: p-Block Elements
- • Nitrogen group (Group 5A): N₂ triple bond, inactivity
- • Ammonia: preparation, detection (HCl white fumes)
- • Nitric acid: oxidizing agent, reactions with metals
- • Phosphorus: white vs red allotropes
- • Arsenic: wood preservative (poisonous)
- • Chemical passivity: Cr, Fe with conc. HNO₃
Lessons
2
in this chapter
Topics
10
key concepts
Questions
47
ready to practice
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