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. Formulae of Some Molecular Compounds
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7. An Important Discussion
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8. an example, let us give the significance of symbol C
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9. Molecular Formulae of Some Common Elements
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10. Chemical Formulae
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11. 2. A Negatively Charged Ion is Known as Anion
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12. As an example, let us give the significance of the formula H2O
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13. Molecules
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14. Molecules of Compounds
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15. Molecular Mass
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16. Explanation of the Law of Conservation of Mass
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17. Some Ionic Compounds
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18. Atoms, Molecules and Ions
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19. Atoms
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20. Formula Mass
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21. Formulae of Elements
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22. Mole of Molecules
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23. Simple Ions and Compound Ions (Polyatomic Ions)
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24. 1. A Positively Charged Ion is Known as Cation
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25. Symbols of Elements
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26. 1. Molecules of Elements
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27. Formulae of Compounds
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28. Gram Atomic Mass And Gram Molecular Mass
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29. Mole of Atoms
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30. John Dalton
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31. Ions
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32. Explanation of the Law of Constant Proportions
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33. Dalton's Atomic Theory
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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. Ionic Compounds
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39. Calculation of Molecular Mass
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40. Divalent Anions (Anions Having a Valency of 2-)
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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 Molecules
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46. Gram Molecular Mass
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47. Experiment to Verify Law of Conservation of Mass
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48. Gram Atomic Mass
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49. Laws Of Conservation of Mass
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50. Writing Of Formulae Of Molecular Compounds
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