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Mrs Teo CC Diagrams by Ms Angela Ng

Formation of Ionic Compounds. Mrs Teo CC Diagrams by Ms Angela Ng. Revision I. 1. Atoms of metals have few (1-3) electrons in their outer shells.

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Mrs Teo CC Diagrams by Ms Angela Ng

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  1. Formation of Ionic Compounds Mrs Teo CC Diagrams by Ms Angela Ng

  2. Revision I 1. Atoms of metals have few (1-3) electrons in their outer shells. 2. In chemical reactions, to achieve the electron structures similar to those of noble gases, the metallic atoms________ their valence electrons.to become ___________ ions. lose positive Na + 3. Examples: Na _____ + e Ca _____+ 2e Ca 2+

  3. Revision II 1. Atoms of non-metals have many (4-7) electrons in their outer shells. 2. In chemical reactions, to achieve the electron structures similar to those of noble gases, the non-metallic atoms ________ electrons to become ____________ ions. gain negative 3. Examples: O + 2 e _______ Cl + e _______ O 2- Cl-

  4. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e

  5. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e Cl needs to gain 1 electron Na needs to lose 1 electron What will happen?

  6. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e

  7. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e

  8. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e

  9. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e

  10. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e

  11. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e

  12. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e Electron transfer e e

  13. attraction Reaction between sodium and chlorine - + e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e Na + ion Cl - ion NaCl

  14. ionic bond Positive ions and the negative ions are attracted to each other by an electrostatic force . An ionic bond results from the transfer of electrons from a metal to a non-metal.

  15. Another eg. Reaction between magnesium and oxygen e e e e e e Mg e O e e e e e e e e e e e e e

  16. Reaction between magnesium and oxygen e e e e e e Mg e O e e e e e e e e e e e e e

  17. Reaction between magnesium and oxygen e e e e e e Mg e O e e e e e e e e e e e e e

  18. Reaction between magnesium and oxygen e e e e e e Mg e O e e e e e e e e e e e e e

  19. Reaction between magnesium and oxygen e e e e e e Mg e O e e e e e e e e e e e e e

  20. Reaction between magnesium and oxygen 2+ 2- e e e e e e Mg e O e e e e e e e e e e e e e Mg2+ ion O2- ion MgO

  21. Another eg. Reaction between calcium and chlorine e e e e e e e e e e e e e Ca e Cl e e e e e e e e e e e e e e e e e e e e e e e Calcium will give away 2 electrons but chlorine atom will only take in one electron !

  22. Reaction between calcium and chlorine e e e e e e e e e e e e e Ca e Cl e e e e e e e e e e e e e e e e e e e e e e e Thus 2 chlorine atoms will be needed to take the 2 electrons from calcium atom.

  23. Reaction between calcium and chlorine e e e e e e e e e e e e e e e e e Ca e e e Cl e Cl e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e Thus 2 chlorine atoms will be needed to take the 2 electrons from calcium atom.

  24. Reaction between calcium and chlorine e e e e e e e e e e e e e e e e e Ca e e e Cl e Cl e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e Thus 2 chlorine atoms will be needed to take the 2 electrons from calcium atom.

  25. Reaction between calcium and chlorine e e e e e e e e e e e e e e e e e Ca e e e Cl e Cl e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e Thus 2 chlorine atoms will be needed to take the 2 electrons from calcium atom.

  26. Reaction between calcium and chlorine e e e e e e e e e e e e e e e e Ca e e e e e Cl e Cl e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e Thus 2 chlorine atoms will be needed to take the 2 electrons from calcium atom.

  27. Reaction between calcium and chlorine CaCl2 - 2+ - e e e e e e e e e e e e e e e e Ca e e e e e Cl e Cl e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e Cl- Cl- Ca 2+ Thus 2 chlorine atoms will be needed to take the 2 electrons from calcium atom.

  28. 2. Atoms of ________ ions non-metals Summary During chemical reactions between metals and non-metals:1. Atoms _______ ionsof metals lose electrons positive gainelectrons negative

  29. 3. There is a __________ of electron/s from a metallic atom to a non-metallic atom. transfer 4. The ions are attracted to the ions because of opposite charges. positive negative 5. A compound consisting of positive ions and negative ions is called __________________ an ionic compound.

  30. Examples of Ionic Compounds • sodium chloride, NaCl • magnesium oxide, MgO • calcium chloride, CaCl2 • aluminium oxide, Al2O3 • zinc nitrate, Zn(NO3)2 • iron(III) sulphate, Fe2(SO4)3

  31. Formation of Ionic Compounds Mrs Teo CC Diagrams by Ms Angela Ng

  32. Revision I 1. Atoms of metals have few (1-3) electrons in their outer shells. 2. In chemical reactions, to achieve the electron structures similar to those of noble gases, the metallic atoms________ their valence electrons.to become ___________ ions. lose positive Na + 3. Examples: Na _____ + e Ca _____+ 2e Ca 2+

  33. Revision II 1. Atoms of non-metals have many (4-7) electrons in their outer shells. 2. In chemical reactions, to achieve the electron structures similar to those of noble gases, the non-metallic atoms ________ electrons to become ____________ ions. gain negative 3. Examples: O + 2 e _______ Cl + e _______ O 2- Cl-

  34. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e

  35. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e Cl needs to gain 1 electron Na needs to lose 1 electron What will happen?

  36. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e

  37. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e

  38. Reaction between sodium and chlorine e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e Electron transfer e e

  39. attraction Reaction between sodium and chlorine - + e e e e e e e e Na e Cl e e e e e e e e e e e e e e e e e e e Na + ion Cl - ion NaCl

  40. ionic bond Positive ions and the negative ions are attracted to each other by an electrostatic force . An ionic bond results from the transfer of electrons from a metal to a non-metal.

  41. Another eg. Reaction between magnesium and oxygen e e e e e e Mg e O e e e e e e e e e e e e e

  42. Reaction between magnesium and oxygen e e e e e e Mg e O e e e e e e e e e e e e e

  43. Reaction between magnesium and oxygen e e e e e e Mg e O e e e e e e e e e e e e e

  44. Reaction between magnesium and oxygen 2+ 2- e e e e e e Mg e O e e e e e e e e e e e e e Mg2+ ion O2- ion MgO

  45. Another eg. Reaction between calcium and chlorine e e e e e e e e e e e e e Ca e Cl e e e e e e e e e e e e e e e e e e e e e e e Calcium will give away 2 electrons but chlorine atom will only take in one electron !

  46. Reaction between calcium and chlorine e e e e e e e e e e e e e Ca e Cl e e e e e e e e e e e e e e e e e e e e e e e Thus 2 chlorine atoms will be needed to take the 2 electrons from calcium atom.

  47. Reaction between calcium and chlorine e e e e e e e e e e e e e e e e e Ca e e e Cl e Cl e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e Thus 2 chlorine atoms will be needed to take the 2 electrons from calcium atom.

  48. Reaction between calcium and chlorine e e e e e e e e e e e e e e e e e Ca e e e Cl e Cl e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e Thus 2 chlorine atoms will be needed to take the 2 electrons from calcium atom.

  49. Reaction between calcium and chlorine e e e e e e e e e e e e e e e e Ca e e e e e Cl e Cl e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e Thus 2 chlorine atoms will be needed to take the 2 electrons from calcium atom.

  50. Reaction between calcium and chlorine CaCl2 - 2+ - e e e e e e e e e e e e e e e e Ca e e e e e Cl e Cl e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e Cl- Cl- Ca 2+ Thus 2 chlorine atoms will be needed to take the 2 electrons from calcium atom.

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