• Shorthand was a very popular way of recording speech, especially in dictating letters and in court testimony.
  • Chemists use chemical symbols in combination to indicate specific compounds.
  • Chemical symbols represent a universal language that all chemists can understand, no matter what their native language is.
  • If you know the name of a binary ionic compound, you can write its chemical formula.
  • For example, the ions for the compound lithium oxide are: Li2O.
  • The formula for aluminum nitride is Al2O3.
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