Introduction ​Hydrogen is a flammable gas. It burns in air to produce water. A convenient test for hydrogen is to put a lighted splint in the mouth of...
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Transition metals form coloured compounds
OCREdexcelAQA Transition elements : properties Ligands and complex ions Ligand substitution and precipitation Redox reactions Electron con...
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The elements in the periodic table are organised in order of increasing atomic number.
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Carbon atoms have an electron configuration of 2,4
1.19 Deducing electron configurations Students should: 1.19 understand how to deduce the electronic configurations of the first 20 element...
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A shortened form of the periodic table showing the first 18 elements and their electron configuration.
1.20 - 1.22 Activity 2. Periodic variations Students should: 1.20 understand how to use electrical conductivity and the acid-base characte...
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1.23 Family resemblances Hydrogen is often listed above group 1 the Alkali metals. Although like group 1 atoms, hydrogen atoms have a ...
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The elements in the periodic table are organised in order of increasing atomic number.
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Diabetics need to test blood glucose levels regularly.
Carbonyl compounds all contain a C=O double bond. This is usually formed when an alcohol is oxidised using an oxidizing agent such as ...
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This animation allows you to see the electron arrangements which explain the formation of some double and triple bonds. Bond lengths and bond energy&n...
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First ionisation energiesInfogram Enter your text here ... Enter your text here ... Enter your text here ...
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Crystallisation can be used to separate a solid solute from its solvent. Re-crystallisation is used to purify samples obtained in the laboratory. But what is a crystal?
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Find out about fractional distillation ; why it is different from simple distillation and how it can be used industrially
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Distillation is used to separate liquids from one another. Visit this page to see distillation in the laboratory and look at an industrial scale process.
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Chromatography is another important separation technique. Several different types of chromatography exist.
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Filtration can be a simple technique used to separate insoluble solids from a mixture or suspension. It has a lot of everyday applications.
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compounds, elements or mixtures, ecosystems or environments?
Sun and air? Study the seaside image for a few seconds . Try to describe it: You might say that the image shows : A calm sea, clear blue sky, br...
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compounds, elements or mixtures ?
Sun and air? Study the seaside image for a few seconds . Try to describe it: You might say that the image shows : A calm sea, clear blue sky, br...
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Sun and air ​Study the seaside image for a few seconds . Try to describe it: You might say that the image shows : A calm sea, cle...
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The Dead Sea is below sea level, this means that it does not drain so that although the water evaporates, the salt will stay, this means that the dead...
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