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. Dalton’s Symbols of Elements

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

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

6. Formulae of Some Molecular Compounds

7. An Important Discussion

8. Molecular Formulae of Some Common Elements

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

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

11. Chemical Formulae

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

13. Molecules

14. Molecular Mass

15. Molecules of Compounds

16. Explanation of the Law of Conservation of Mass

17. Some Ionic Compounds

18. Atoms, Molecules and Ions

19. Atoms

20. Formula Mass

21. Mole of Molecules

22. Formulae of Elements

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

24. Simple Ions and Compound Ions (Polyatomic Ions)

25. 1. Molecules of Elements

26. Symbols of Elements

27. Gram Atomic Mass And Gram Molecular Mass

28. John Dalton

29. Mole of Atoms

30. Formulae of Compounds

31. Ions

32. Explanation of the Law of Constant Proportions

33. Dalton's Atomic Theory

34. Significance of the Formula of a Substance

35. Some Common Ions

36. Molecular Masses of Some Common Elements

37. Ionic Compounds

38. Laws Of Chemical Combination

39. Calculation of Molecular Mass

40. Formula Unit of Ionic Compounds

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

42. Atoms And Molecules

43. How Do Atoms Exist

44. Writing Of Formulae Of Ionic Compounds

45. Problems Based On Moles Of Molecules

46. Experiment to Verify Law of Conservation of Mass

47. Gram Molecular Mass

48. Gram Atomic Mass

49. Laws Of Conservation of Mass

50. Atomic Radii of Some Common Elements