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{| class="wikitable"
|[[File:DeuteriumTritium.png|center|200px]]|[[File:DeuteriumSymbolTritiumSymbol.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" colspan = "2"|[[Hydrogen]] always has 1 [[proton]] but in this [[isotope]] there is 1 [[neutron]]. This [[isotope]] of [[Hydrogen]] is known as [[Deuterium]].
|}