Chemistry

Atoms and Molecules


As an example, let us give the significance of the formula H2O


H2O represents water.
2. H2O represents one molecule of water.
3.H2O also represents one mole of molecules of water. That is,As an example, let us give the significance of the formula H2O also represents 6.022 x 1023 moleculesof water.
4.H2O tells us that water contains two elements, hydrogen and oxygen.
5.H2O tells us that one molecule of water contains 2 atoms of hydrogen and 1 atom of oxygen.
6.H2O represents 18 grams of water (which is equal to the molecular mass of water expressed in grams).Before we go further and discuss ions, please answer the following questions:

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Notes
Atoms and Molecules - Notes
1. Drawbacks of Dalton’s Atomic Theory
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2. Monovalent Cations (Cations Having a Valency of 1+)
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3. Divalent Cations (Cations Having a Valency of 2+)
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4. Dalton’s Symbols of Elements
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5. Trivalent Cations (Cations Having a Valency of 3+)
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6. an example, let us give the significance of symbol C
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7. Formulae of Some Molecular Compounds
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8. Molecular Formulae of Some Common Elements
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9. Chemical Formulae
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10. An Important Discussion
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11. 2. A Negatively Charged Ion is Known as Anion
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12. Molecules
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13. Explanation of the Law of Conservation of Mass
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14. As an example, let us give the significance of the formula H2O
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15. Atoms
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16. Molecular Mass
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17. Molecules of Compounds
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18. Some Ionic Compounds
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19. Formulae of Elements
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20. Simple Ions and Compound Ions (Polyatomic Ions)
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21. Symbols of Elements
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22. Atoms, Molecules and Ions
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23. Formula Mass
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24. Formulae of Compounds
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25. 1. A Positively Charged Ion is Known as Cation
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26. Gram Atomic Mass And Gram Molecular Mass
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27. Mole of Atoms
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28. 1. Molecules of Elements
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29. Mole of Molecules
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30. Ions
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31. Dalton's Atomic Theory
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32. John Dalton
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33. Explanation of the Law of Constant Proportions
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34. Significance of the Formula of a Substance
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35. Some Common Ions
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36. Molecular Masses of Some Common Elements
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37. Laws Of Chemical Combination
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38. Divalent Anions (Anions Having a Valency of 2-)
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39. Calculation of Molecular Mass
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40. Ionic Compounds
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41. Formula Unit of Ionic Compounds
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42. Atoms And Molecules
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43. How Do Atoms Exist
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44. Writing Of Formulae Of Ionic Compounds
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45. Problems Based On Moles Of Atoms
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46. Symbols Derived from Latin Names of the Elements
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47. Gram Molecular Mass
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48. Laws Of Conservation of Mass
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49. Writing Of Formulae Of Molecular Compounds
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50. Experiment to Verify Law of Conservation of Mass
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