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==Key Stage 3==
===Meaning===
[[File:ElementTile.png|right|300px400px|thumb|An [[element]] tile showing the [[Chemical Symbol]].]]
A [[Chemical Symbol]] is a shortened name for an [[element]].
|[[File:BerylliumSymbol.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |[[Hydrogen]] has the symbol [[H]]. The [[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 [[He]]. The [[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 [[Li]]. The [[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 [[Be]]. The [[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.
|}