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SS1: CHEMISTRY - 1ST TERM

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  1. Introduction to Chemistry and Laboratory Apparatus | Week 1
    5Topics
    |
    1 Quiz
  2. Nature of Matter | Week 2
    3Topics
    |
    1 Quiz
  3. Separation Techniques I | Week 3
    1Topic
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    1 Quiz
  4. Separation Techniques II | Week 4
    5Topics
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    1 Quiz
  5. Particulate Nature of Matter I | Week 5
    5Topics
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    1 Quiz
  6. Particulate Nature of Matter II | Week 6
    9Topics
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    1 Quiz
  7. Symbols, Formulae & Oxidation Number | Week 7
    7Topics
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    1 Quiz
  8. Laws of Chemical Combination | Week 8
    4Topics
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    1 Quiz
  9. Chemical Equation & Chemical Combination (Chemical Bonding) I | Week 9
    4Topics
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    1 Quiz
  10. Chemical Combination (Chemical Bonding) II | Week 10
    4Topics
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    1 Quiz
  11. Chemical Combination (Chemical Bonding) III & Shapes of Covalent Molecules | Week 11
    3Topics
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    1 Quiz
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Tertiary and Quaternary Compounds are compounds containing more than two elements. In naming them, the following procedures are followed:

(i) The name of the most electropositive element is written first followed by the most electronegative element.

(ii) If the metal has a variable oxidation number, its oxidation number is written in Roman numerals immediately after the element.

(iii) The oxidation number of the central atom is written in Roman numeral at the end of the radical. Example: Fe2(CO3)3 – Iron (III) trioxocarbonate (IV).

(iv) Acid Radicals are named as hydrogen derivatives with the oxidation number of the central atom indicated at the end of the radical before writing the word “acid”. Example: 

H2SO4 – Tetraoxosulphate (VI) acid

HNO3 – Trioxonitrate (V) acid

(v) In metallic or Ammonium hydroxide, the metallic radical or Ammonium is named first, followed by the word hydroxide.

Example: 

NaOH – Sodium hydroxide, 

Ca(OH)2 – Calcium hydroxide, 

NH4OH – Ammonium hydroxide.

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