Chapter 7 of 10
Concept Maps
Atoms and Molecules — Concept Maps
Tamil Nadu Board · Class 10 · Science
3 concept maps of Atoms and Molecules for Tamil Nadu Board Class 10 Science, each also written out as a text outline.
44 questions36 flashcards5 concepts
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3 Concept Maps
Atoms and Molecules – Complete Chapter Overview
The map in words
- Atoms and Molecules
- Atomic Mass
- Atomic Mass Unit
- 1 amu = 1/12 of C12
- Symbol U
- Relative Atomic Mass
- Ratio to C12 standard
- No unit
- Average Atomic Mass
- Weighted average of isotopes
- Why decimals in periodic table
- Atomic Mass Unit
- Isotopes Isobars Isotones
- Isotopes
- Same atomic number
- Different mass number
- Example Cl35 Cl37
- Isobars
- Same mass number
- Different atomic number
- Example Ar40 Ca40
- Isotones
- Same neutron number
- Example C13 N14
- Isotopes
- Molecules
- Homoatomic
- H2 O2 N2 O3
- P4 S8
- Heteroatomic
- HCl H2O CO2
- NH3 H2SO4
- Atomicity
- Monoatomic noble gases
- Diatomic 2 atoms
- Triatomic 3 atoms
- Polyatomic more than 3
- Homoatomic
- Molecular Mass
- Relative Molecular Mass
- Sum of atomic masses
- No unit ratio
- Gram Molecular Mass
- RMM expressed in grams
- H2O = 18g CO2 = 44g
- Relative Molecular Mass
- Mole Concept
- 1 mole = 6.023e23 entities
- Avogadro Number Na
- Gram Atomic Mass
- Gram Molecular Mass
- Molar Volume
- 22.4 L at STP
- Percentage Composition
- Mass percent formula
- Sum equals 100 percent
- Used for empirical formula
- Avogadro Law
- Equal volumes equal molecules
- Same T and P
- V proportional to n
- Applications
- Gay Lussac Law
- Atomicity
- Molar volume
- Vapour density relation
- Vapour Density
- Ratio to hydrogen mass
- No unit
- Molecular Mass = 2 x VD
- Atomic Mass
Mind map showing all major applications of Avogadro's law in chemistry
The map in words
- Applications of Avogadro's Law
- Explains Gas Reactions
- Volume Ratios
- Gay-Lussac's Law
- Molecular Ratios
- Determines Properties
- Atomicity
- Molecular Mass
- Vapour Density
- Establishes Constants
- Molar Volume 22.4 L
- Avogadro's Number
- Predicts Behavior
- Reaction Volumes
- Molecular Formulas
- Explains Gas Reactions
Summary of key formulas organized by category: atomic, molecular, and mole formulas
The map in words
- Atomic Formulas
- Ar = avg mass / C-12 reference
- AAM = Sum of isotope contributions
- Molecular Formulas
- RMM = Sum of Ar values
- % comp = element mass / RMM × 100
- Mole Formulas
- n = m/M = N/Nₐ = V/22.4
- RMM = 2 × VD
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Explore DiagramsFrequently Asked Questions
What are the important topics in Atoms and Molecules for Tamil Nadu Board Class 10 Science?
Key topics in Atoms and Molecules include Modern Atomic Theory – Key Postulates, Atom and Atomic Mass, Molecules, Molecular Mass, and Atomicity, Mole Concept. Study these first, then practise questions on each for the Tamil Nadu Board Class 10 board exam.
What do the concept maps for Atoms and Molecules show?
The 3 maps show how the ideas in Atoms and Molecules connect: Atoms and Molecules – Complete Chapter Overview; Mind map showing all major applications of Avogadro's law in chemistry. Each map is also written out as an outline on this page.
How should I revise Atoms and Molecules for the Tamil Nadu Board Class 10 board exam?
Learn the core ideas first, then work through the 44 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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