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[O] Pure Chemistry Smart Guides

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  1. I. EXPERIMENTAL CHEMISTRY

    1. Measurement & Experimental Techniques
    2 Topics
  2. 2. Separation & Purification
    5 Topics
  3. II. ATOMIC STRUCTURE
    3. Kinetic Particle Theory
    5 Topics
  4. 4. Elements, Compounds & Mixtures
    3 Topics
  5. 5. Atomic Structure
    3 Topics
  6. 6. Chemical Bonding
    4 Topics
  7. III. STOICHIOMETRY
    7. Writing Chemical Equations
    2 Topics
  8. 8. The Mole Concept
    4 Topics
  9. 9. Chemical Calculations
    6 Topics
  10. IV. CHEMISTRY OF REACTIONS
    10. Acids & Bases
    4 Topics
  11. 11. Salts
    3 Topics
  12. 12. Qualitative Analysis
    4 Topics
  13. 13. Oxidation & Reduction
    6 Topics
  14. 14. Electrolysis
    6 Topics
  15. 15. Energy Changes
    3 Topics
  16. 16. Speed of Reaction
    2 Topics
  17. 17. Ammonia
    1 Topic
  18. V. PERIODICITY
    18. Metals
    7 Topics
  19. 19. Periodic Table
    3 Topics
  20. VI. ATMOSPHERE
    20. Air & Atmosphere
    3 Topics
  21. VII. ORGANIC CHEMISTRY
    21. Organic Chemistry
    2 Topics
  22. 22. Alkanes & Alkenes
    7 Topics
  23. 23. Alcohols & Carboxylic Acids
    5 Topics
  24. 24. Macromolecules
    4 Topics
Chapter 5, Topic 2
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Isotopes

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What are isotopes?

  • They are atoms of the same element with same number of protons and electrons but different number of neutrons.

Isotopes of an element have the same chemical properties as the atoms of the same element.

  • Chemical reactions involve only the electrons and not the neutrons.
  • Isotopes have the same number of electrons as their atoms, hence they have the same chemical properties.

Isotopes of an element have different physical properties compared to the atoms of the same element.

  • Isotopes have different masses (due to the different number of neutrons) and as their physical properties are affected by mass, they will have different physical properties.

Uses of Isotopes

Area of useIsotopeFunction
ArchaeologyCarbonEstimating the ages of things containing carbon
GeologyUraniumEstimating the ages of rocks
Safety and SecurityAmericiumUsed in smoke detectors
Safety and SecurityCaliforniumDetection of explosives