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*[[Tin]] = [[Sn]]
*[[Mercury]] = [[Hg]]
==Key Stage 4==
===Meaning===
A [[Chemical Symbol]] is a shortened name for an [[element]] and how different [[element]]s are represented in [[Chemical Formula|chemical formulae]].
===About Chemical Symbols===
: [[Chemical Symbol]]s are used to write [[Balanced Symbol Equation]]s.
: Most [[Chemical Symbol]]s use the letters in their name for the symbol but some use letters from their old names.