Atoms, Compounds and Equations

• Relative atomic mass


  The weighted mean mass of an atom of an element compared to 1/12 of the mass of an atom of carbon-12
• Relative Isotopic mass

  The mass of an atom of an isotope compared to 1/12 of the mass of an atom of carbon-12
• room temperature (kelvin)

  298 K
• room pressure

  100 kPa (1 atm)
• Celcius to Kelvin

  +273
• Water of Crystalisation

  water in a lattice
• Hydrated Salt


  A salt containing water of crystalisation
• Anhydrous salt


  A salt that doesn't contain water of crystalisation