Chemistry

Atoms and Molecules

Formulae of Some Molecular Compounds

Name	Formula	Elements present
1.Water 2.Carbon dioxide 3.Sulphur dioxide 4.Ammonia 5.Methane 6.Ethanol (Alcohol) 7.Hydrogen chloride 8.Carbon tetrachloride (Tetrachloromethane) 9.Hydrogen sulphide 10.Carbon disulphide	$H$ ₂O $Co$ ₂ $SO$ ₂ $NH$ ₃ $CH$ ₄ $C$ ₂H₅OH HC1 $CCl$ ₄ $H$ ₂S $CS$ ₂	Hand O C and O S and O N and H C and H C, H and O H and Cl C and Cl H and S C and S

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Notes

Atoms and Molecules - Notes

1. Drawbacks of Dalton’s Atomic Theory

2. Monovalent Cations (Cations Having a Valency of 1+)

3. Divalent Cations (Cations Having a Valency of 2+)

4. Dalton’s Symbols of Elements

5. Trivalent Cations (Cations Having a Valency of 3+)

6. Formulae of Some Molecular Compounds

7. an example, let us give the significance of symbol C

8. Chemical Formulae

9. An Important Discussion

10. Molecular Formulae of Some Common Elements

11. 2. A Negatively Charged Ion is Known as Anion

12. Molecules

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

14. Explanation of the Law of Conservation of Mass

15. Molecules of Compounds

16. Atoms

17. Molecular Mass

18. Some Ionic Compounds

19. Atoms, Molecules and Ions

20. Formulae of Elements

21. Simple Ions and Compound Ions (Polyatomic Ions)

22. Formulae of Compounds

23. Formula Mass

24. Symbols of Elements

25. 1. A Positively Charged Ion is Known as Cation

26. Gram Atomic Mass And Gram Molecular Mass

27. Mole of Molecules

28. Mole of Atoms

29. 1. Molecules of Elements

30. Ions

31. John Dalton

32. Dalton's Atomic Theory

33. Explanation of the Law of Constant Proportions

34. Significance of the Formula of a Substance

35. Some Common Ions

36. Molecular Masses of Some Common Elements

37. Laws Of Chemical Combination

38. Divalent Anions (Anions Having a Valency of 2-)

39. Ionic Compounds

40. Calculation of Molecular Mass

41. Formula Unit of Ionic Compounds

42. Atoms And Molecules

43. How Do Atoms Exist

44. Writing Of Formulae Of Ionic Compounds

45. Gram Molecular Mass

46. Problems Based On Moles Of Atoms

47. Problems Based On Moles Of Molecules

48. Laws Of Conservation of Mass

49. Experiment to Verify Law of Conservation of Mass

50. Atomic Mass Of An Element