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Chemical formulae

Points to note

  • chemical formulae follow regular patterns and as such it is straightforward to vary the elements involved yet still match the correct response
  • the symbol for an element must be entered in the correct case e.g. magnesium is 'Mg' not 'mg'
  • subscripts must also be properly applied; H2O is correct but H2O is not

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Chris Nelson
Product Development Manager
The Open University
chris.nelson@open.ac.uk

Greg Black
Production Manager
The Open University
greg.black@open.ac.uk