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This week’s key element is HELIUM

  Background Information Helium was discovered by Pierre Janssen and Norman Lockyer in 1868 and was named after the Greek   God of the sun Helios. Helium is at the top of the noble gas group in the periodic table ( group 7) and it has 2 electrons. It is odourless, colourless and tasteless [...]

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This week’s key element is HYDROGEN

 Background Information Hydrogen was discovered by Henry Cavendish in 1766 and was later named by Antoine  Lavoisier in 1783. It is the first element of the periodic table and is also the lightest, with an atomic mass of only 1.008. The hydrogen atom has 1 electron. Hydrogen is also the most abundant chemical substance [...]

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