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Formula Sheet

Atoms and Molecules — Formula Sheet

NIOS · Class 10 · Science & Tech

3 formulas from Atoms and Molecules (NIOS Class 10 Science & Tech) on one page, grouped by topic. Part of the NIOS Class 10 Science & Tech syllabus.

93 questions42 flashcards3 formulas & key relations5 concepts

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An infographic comparing the ancient Indian (Maharishi Kanad, Pakudha Katyayan) and Greek (Democritus, Leucippus) philosophical ideas about the divisibility of matter and the concept of 'Parmanu' and
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3 Entries · 2 Sections

Formulas and Key Relations

4. Atom, atomic mass and isotopes

Total mass of the nucleus = mass of protons + mass of neutrons

Average atomic mass = (35 x 3 + 37 x 1) / 4 = 142 / 4 = 35.5 u

Size, Mass, Atomic Number, and Isotopes

Nanometer is used to express atomic size, and 1 nm = 10^-9 m.

Full sheet with units and worked examples

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Frequently Asked Questions

What are the important topics in Atoms and Molecules for NIOS Class 10 Science & Tech?
Key topics in Atoms and Molecules include Laws of Chemical Combination, Dalton’s Atomic Theory and Atom, Size, Mass, Atomic Number, and Isotopes, Molecule, Molecular Mass, and Formula Mass. Study these first, then practise questions on each for the NIOS Class 10 board exam.
How many formulas are in Atoms and Molecules?
This sheet lists 3 formulas from Atoms and Molecules, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Atoms and Molecules for the NIOS Class 10 board exam?
Learn the core ideas first, then work through the 93 practice questions on Atoms and Molecules. 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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All NIOS Class 10 Science & Tech Formula Sheet

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