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Formula Sheet

Study of the First Element - Hydrogen

ICSE · Class 9 · Chemistry

All formulas from Study of the First Element - Hydrogen in ICSE Class 9 Chemistry. Key equations, constants, and identities for board exam preparation.

44 questions40 flashcards5 concepts

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An infographic illustrating hydrogen's similarities to both Group 1 (alkali metals) and Group 17 (halogens) elements, explaining why its position is unique and debated.
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9 Formulas · 3 Sections

Formulas

Position and Nature of Hydrogen

H ; H2 ; valency 1 ; electronic configuration 1

Atomic number 1

Hydrogen from Water

2K + 2H2O -> 2KOH + H2

2Na + 2H2O -> 2NaOH + H2

Ca + 2H2O -> Ca(OH)2 + H2

Mg + 2H2O -> Mg(OH)2 + H2

Mg + H2O -> MgO + H2

Activity Series and Preparation of Hydrogen

Arrangement of metals in decreasing order of reactivity in the form of a series is called the activity or reactivity series of metals.

K > Na > Ca > Mg > Al > Zn

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Frequently Asked Questions

What are the important topics in Study of the First Element - Hydrogen for ICSE Class 9 Chemistry?
Study of the First Element - Hydrogen covers several key topics that are frequently asked in ICSE Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Study of the First Element - Hydrogen — ICSE Class 9 Chemistry?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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