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I. States of matter
(210)
1. Basic properties of matter
(22)
2. Gases
(23)
3. Liquids
(27)
4. Solids
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5. Changes of state
(27)
6. Physical changes accompanying heating and cooling
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7. Diffusion and dissolving
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8. Gas laws. Part I
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II. Elements, compounds and mixtures
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10. Elements
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11. Chemical compounds
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16. Continuous and line spectra
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17. The Bohr model of the atom
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IV. Bonding
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19. Ionic bonding. Part I
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21. Covalent bonding. Part I
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V. Representing chemical reactions
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VI. Quantitative aspects of chemical reactions
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30. Atomic and molecular mass
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IX. The periodic table and chemical properties of the elements
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48. Alkaline earth metals. Group 2
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49. Halogens. Group 17
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XI. Electrolysis
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55. Conductivity of electrolytes
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56. Electrolysis
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XII. Organic chemistry
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58. Alkanes
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59. Isomerism of alkanes
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86. The structure of the Earth
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88. Tectonic movements, earthquakes and volcanoes
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89. Igneous rocks
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90. Sedimentary rocks. Part I
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91. Sedimentary rocks. Part II
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93. The atmosphere
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95. Handling liquids
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96. Handling solids. Heating
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97. Gases: handling and laboratory tests
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98. Testing for ions
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99. Safety in the chemical laboratory
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Resources: 1 – 25 Total: 33
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Chemical elements essential for plants
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Chemical elements that make up black soil
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Elements required by plants
Chart
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Eutrophication of water basins
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Factors affecting plants' growth
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Fertilisers
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Fertilisers
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Fertility of the soil
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How can we prevent fertilisers from getting into water basins?
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Metalic elements of the soils
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Minerals which contain potassium
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Nitrogen
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Nitrogen content
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Nitrogen fertilisers
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Nitrogen fertilisers
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Phosphatic fertilisers
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Phosphatic fertilisers
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Phosphatic fertilisers
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Phosphorus
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Potassium
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Potassium fertilisers
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Potassium fertilisers
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Preparation of calcium dihydrogen phosphate and ammonium hydrogen phosphate
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Preparation of nitrogen fertilisers
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Preparation of potassium chloride
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Resources: 1 – 25 Total: 33
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