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===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. An example of this is [[Lead]] which has the symbol [[Lead|Pb]] because it used to be called 'plumbum'.
===Examples===
|[[File:BerylliumSymbol.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Hydrogen]] has the symbol [[Hydrogen|H]]. The [[Relative Atomic Mass Number|mass number]] shows there is 1 [[particle]] in the [[nucleus]] and the [[Atomic Number|atomic number]] shows that it has 1 [[proton]].| style="height:20px; width:200px; text-align:center;" |[[Helium]] has the symbol [[Helium|He]]. The [[Relative Atomic Mass Number|mass number]] shows there are 4 [[particle]]s in the [[nucleus]] and the [[Atomic Number|atomic number]] shows that it has 2 [[proton]]s.| style="height:20px; width:200px; text-align:center;" |[[Lithium]] has the symbol [[Lithium|Li]]. The [[Relative Atomic Mass Number|mass number]] shows there are 7 [[particle]]s in the [[nucleus]] and the [[Atomic Number|atomic number]] shows that it has 3 [[proton]]s.| style="height:20px; width:200px; text-align:center;" |[[Beryllium]] has the symbol [[Beryllium|Be]]. The [[Relative Atomic Mass Number|mass number]] shows there are 9 [[particle]]s in the [[nucleus]] and the [[Atomic Number|atomic number]] shows that it has 4 [[proton]]s.
|}
===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 '']