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Formula Sheet

Periodic Classification of Elements — Formula Sheet

NIOS · Class 10 · Science & Tech

4 formulas from Periodic Classification of Elements (NIOS Class 10 Science & Tech) on one page, grouped by topic.

44 questions40 flashcards4 formulas & key relations5 concepts

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An illustration showing a well-organized chemist's shop with medicines classified and arranged, contrasting it with a disorganized one, to explain the need for classifying elements.
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4 Entries · 2 Sections

Formulas and Key Relations

Dobereiner's Triads

(7 + 39) / 2 = 23

(40 + 137) / 2 = 88.5

(35.5 + 127) / 2 = 81.25

Mendeleev's Periodic Table

The chemical and physical properties of elements are a periodic function of their atomic masses.

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Frequently Asked Questions

What are the important topics in Periodic Classification of Elements for NIOS Class 10 Science & Tech?
Key topics in Periodic Classification of Elements include Development of Classification of Elements, Dobereiner’s Triads, Newlands’ Law of Octaves, Mendeleev’s Periodic Law and Periodic Table. Study these first, then practise questions on each for the NIOS Class 10 board exam.
How many formulas are in Periodic Classification of Elements?
This sheet lists 4 formulas from Periodic Classification of Elements, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Periodic Classification of Elements for the NIOS Class 10 board exam?
Learn the core ideas first, then work through the 44 practice questions on Periodic Classification of Elements. Revise 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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