John Dalton
John Dalton was bom in 1766 in a poor weaver's family in England.He received his early education from his father and at the village school.Dalton started teaching in the village at the age of 12.In 1793, Dalton left for Manchester to teach physics,chemistry and mathematics in a college. In 1794,he described colour blindness. In 1808, Dalton presented his atomic theory to explain the properties of matter. Dalton's atomic theory of matter became one of the foundations of modem chemistry.Dalton was the first to calculate the masses of the atoms of several elements. He died in 1844.
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Atoms and Molecules - Notes
2. Monovalent Cations (Cations Having a Valency of 1+)
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4. Divalent Cations (Cations Having a Valency of 2+)
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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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8. Molecular Formulae of Some Common Elements
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9. an example, let us give the significance of symbol C
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10. As an example, let us give the significance of the formula H
2O
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12. 2. A Negatively Charged Ion is Known as Anion
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16. Explanation of the Law of Conservation of Mass
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23. 1. A Positively Charged Ion is Known as Cation
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24. Simple Ions and Compound Ions (Polyatomic Ions)
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27. Gram Atomic Mass And Gram Molecular Mass
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32. Explanation of the Law of Constant Proportions
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34. Significance of the Formula of a Substance
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36. Molecular Masses of Some Common Elements
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41. Divalent Anions (Anions Having a Valency of 2-)
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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. Experiment to Verify Law of Conservation of Mass
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50. Atomic Radii of Some Common Elements
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