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===About Chemical Symbols===
: [[Chemical Symbol]]s are used to write [[Chemical Formula|chemical formulae]] and [[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. An example of this is [[Lead]] which has the symbol [[Lead|Pb]] because it used to be called 'plumbum'.
: The '''chemical symbols''' of all the [[element]]s can be seen on the [[Periodic Table]]:
{| class="wikitable"
*CO<sub>2</sub>: [[Carbon Dioxide]] with one [[Carbon]] [[atom]] and two [[Oxygen]] [[atom]]s.
*Li<sub>2</sub>O: [[Lithium Oxide]] with two [[Lithium]] [[atom]]s and one [[Oxygen]] [[atom]].
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/0198359381/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359381&linkCode=as2&tag=nrjc-21&linkId=47c8d1ae58d8b3a5e2094cd447154558 ''Chemical symbols, pages 4-5, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
====OCR====
:[https://www.amazon.co.uk/gp/product/0198359829/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359829&linkCode=as2&tag=nrjc-21&linkId=90e8d7b4f039d53035238fa0320fe00b ''Chemical symbols, page 28, Gateway GCSE Chemistry, Oxford, OCR '']