Chapter 8 of 16
Syllabus
Elements of Group 1 and 2 — Syllabus
Maharashtra Board · Class 11 · Chemistry
What Elements of Group 1 and 2 covers in Maharashtra Board Class 11 Chemistry: 4 topics, for the 2026-27 session.
45 questions24 flashcards5 concepts
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4 Topics · Maharashtra Board Class 11 Chemistry · 2026-27
Topics in Elements of Group 1 and 2
1
8.1 Hydrogen - The Unique Element
- Hydrogen has the simplest atomic structure with one proton and one electron
- Electronic configuration: 1s¹ (similar to both Group 1: ns¹ and Group 17: ns²np⁵)
- Three isotopes: Protium (¹H), Deuterium (²H or D), and Tritium (³H or T)
2
8.2 Group 1 Elements - Alkali Metals
- Elements: Li, Na, K, Rb, Cs, Fr (Fr is radioactive)
- Electronic configuration: [noble gas] ns¹
- Most electropositive elements with lowest ionization enthalpies
3
8.3 Group 2 Elements - Alkaline Earth Metals
- Elements: Be, Mg, Ca, Sr, Ba, Ra (Ra is radioactive)
- Electronic configuration: [noble gas] ns²
- Form divalent cations (M²⁺) with inert gas configuration
4
8.4 Diagonal Relationship
- Li resembles Mg (diagonal relationship across periods 2-3)
- Be resembles Al (diagonal relationship across periods 2-3)
- Due to similar charge/size ratios and polarizing power
Key Concepts
Group 1 elements have ns¹ configurationHydrogen has three isotopesDown both groupsBoth groups are highly reactive dueLi resembles Mg
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What are the important topics in Elements of Group 1 and 2 for Maharashtra Board Class 11 Chemistry?
Key topics in Elements of Group 1 and 2 include 1 Hydrogen - The Unique Element, 2 Group 1 Elements - Alkali Metals, 3 Group 2 Elements - Alkaline Earth Metals, 4 Diagonal Relationship. Study these first, then practise questions on each for Class 11 exams.
How should I revise Elements of Group 1 and 2 for Class 11 exams?
Learn the core ideas first, then work through the 45 practice questions on Elements of Group 1 and 2. Revise definitions regularly and use flashcards for quick recall before the exam.
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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