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==Key Stage 2==
===Meaning===
[[Hydrogen]] is a [[gas]] that can catch fire easily.
==Key Stage 3==
[[File:HydrogenSymbol1.png|right|300px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Hydrogen]].]]
[[File:H-1_WK.PNG|right|200px|thumb|A 2 dimensional representation of a [[Hydrogen]] [[atom]] with 1 [[proton]] in the [[Atomic Nucleus|nucleus]] and 1 [[electron]] orbiting the [[Atomic Nucleus|nucleus]].]]
===Meaning===
[[Hydrogen]] is a [[non-metal]] [[element]] with 1 [[proton]] in the [[Atomic Nucleus|nucleus]].
===About Hydrogen===
====Molecular Structure====
: [[Hydrogen]] has the [[Chemical Formula|chemical formula]] [[Hydrogen|H<sub>2</sub>]].
: Two [[Hydrogen]] [[atom]]s join together to form a [[Hydrogen]] [[molecule]].
====Atomic Structure====
: [[Hydrogen]] has 1 [[proton]] and 0 [[neutron]]s so it has an [[Relative Atomic Mass|atomic mass]] of 1.
: An [[atom]] of [[hydrogen]] has one [[electron]].
: A [[Hydrogen]] [[ion]] has usually lost its only [[electron]] to become [[Positive Charge|positively charged]].
====Properties====
: [[Hydrogen]] is a [[gas]] at [[STP|room temperature]].
: [[Hydrogen]] [[gas]] is less [[density|dense]] than [[air]].
: [[Hydrogen]] [[Chemical Reaction|reacts]] with [[Oxygen]] to form [[water]].
====Testing for Hydrogen====
#Collect the [[gas]] in a [[Test Tube|test tube]].
#Place a lit [[Wooden Splint|splint]] over the mouth of the [[Test Tube|test tube]].
#If a 'squeaky pop' [[sound]] is made then the [[gas]] is [[Hydrogen]].
==Key Stage 4==
[[File:HKS4.png|right|200px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Hydrogen]].]]
[[File:H-1_WK.PNG|right|200px|thumb|A 2 dimensional representation of the [[Bohr Model]] of a [[Hydrogen]]-1 [[isotope]] with 1 [[proton]] in the [[Atomic Nucleus|nucleus]] and 1 [[electron]] in its [[Outer Shell|outer shell]].]]
===Meaning===
[[Hydrogen]] ('''is a [[non-metal]] [[element]] with 1 [[proton]] in the [[Atomic Nucleus|nucleus]].===About Hydrogen=======Molecular Structure====: [[Hydrogen]] has the [[Chemical Formula|chemical formula]] [[Hydrogen|H<sub>2</sub>''') is ]].: Two [[Hydrogen]] [[atom]]s join together in a [[Covalent Bond|covalent bond]].{| class="wikitable"|-|[[File:HydrogenDotandCrossDiagram.png|center|400px]]|-| style="height:20px; width:200px; text-align:center;" |A [[Dot and Cross Diagram|dot and cross diagram]] of a [[gasHydrogen]] [[molecule]].|}====Atomic Structure====: The most common [[isotope]] of [[Hydrogen]]eous (has 1 [[Standard Temperature proton]] and Pressure0 [[neutron]]s so it has an [[Relative Atomic Mass|atomic mass]] of 1. {| class="wikitable"| style="height:20px; width:200px; text-align:center;" |[[Hydrogen]]| style="height:20px; width:200px; text-align:center;" |[[Deuterium]]| style="height:20px; width:200px; text-align:center;" |[[Tritium]]|-|[[File:Hydrogen.png|center|200px]]|[[File:Deuterium.png|center|200px]]|[[File:Tritium.png|center|200px]]|-|[[File:HydrogenSymbol.png|center|200px]]|[[File:DeuteriumSymbol.png|center|200px]]|[[File:TritiumSymbol.png|center|200px]]|-| style="height:20px; width:200px; text-align:center;" |STP[[Hydrogen]] always has 1 [[proton]] but [[isotope]]) there are no [[nonneutron]]s.| style="height:20px; width:200px; text-metalalign:center;" |[[Hydrogen]] always has 1 [[proton]] but in this [[isotope]] there is 1 [[neutron]]. This [[isotope]] of [[Hydrogen]] is known as [[Deuterium]] .| style="height:20px; width:200px; text-align:center;" |[[elementHydrogen]] with always has 1 [[proton]] but in this [[isotope]] there is 2 [[neutron]]s. This [[isotope]] of [[Hydrogen]] is known as [[Tritium]].|}: An [[atom]] of [[hydrogen]] has one [[electron]].: A [[Hydrogen]] [[ion]] has usually lost its only [[electron]] to become [[Positive Charge|positively charged]].====Properties====: [[Hydrogen]] is a [[gas]] at [[STP|standard temperature and pressure]].: [[Hydrogen]] [[Atomic Nucleusgas]] is less [[density|dense]] than [[air]].: [[Hydrogen]] [[Chemical Reaction|nucleusreacts]] with [[Oxygen]] to form [[water]].
====Testing for Hydrogen====
#Collect the [[gas]] in a [[Test Tube|test tube]].
#Place a lit [[Wooden Splint|splint]] over the mouth of the [[Test Tube|test tube]].
#If a 'squeaky pop' [[sound]] is made then the [[gas]] is [[Hydrogen]].
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/1471851346/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851346&linkCode=as2&tag=nrjc-21&linkId=3ac654f4b0da781c49c855a1af4c92ea ''Hydrogen, identification of, page 207, GCSE Chemistry, Hodder, AQA '']
:[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Hydrogen, page 106, GCSE Physics; Third Edition, Oxford University Press, AQA '']
:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Hydrogen, pages 109, 130-1, 280-1, 283-4, 286-7, GCSE Physics; Student Book, Collins, 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 ''Hydrogen, pages 28, 8 6, 88-89, 122-123, 159, 184, GCSE Chemistry; Third Edition, Oxford University Press, AQA '']
:[https://www.amazon.co.uk/gp/product/178294639X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294639X&linkCode=as2&tag=nrjc-21&linkId=51599bb45a2bfaf7c1b6a978b2ca2616 ''Hydrogen, pages 57, 134, GCSE Combined Science Trilogy; Chemistry, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945962/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945962&linkCode=as2&tag=nrjc-21&linkId=476bb5c8d1dfb5c08ac81b6d4d1c98d8 ''Hydrogen, pages 57, 159, GCSE Chemistry, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1471851362/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851362&linkCode=as2&tag=nrjc-21&linkId=7d78d70a2044ee9982dae010c94af92a ''Hydrogen, test for, pages 160, GCSE Combined Science Trilogy 2, Hodder, AQA '']
:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Hydrogen; bomb, page 131, GCSE Physics; Student Book, Collins, AQA '']
:[https://www.amazon.co.uk/gp/product/178294639X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294639X&linkCode=as2&tag=nrjc-21&linkId=51599bb45a2bfaf7c1b6a978b2ca2616 ''Hydrogen; test for, page 203, GCSE Combined Science Trilogy; Chemistry, CGP, AQA '']
:[https://www.amazon.co.uk/gp/product/1782945962/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945962&linkCode=as2&tag=nrjc-21&linkId=476bb5c8d1dfb5c08ac81b6d4d1c98d8 ''Hydrogen; test for, page 257, GCSE Chemistry, CGP, AQA '']
====Edexcel====
:[https://www.amazon.co.uk/gp/product/1782945741/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945741&linkCode=as2&tag=nrjc-21&linkId=30da4f2178da182547b62a7329d13b57 ''Hydrogen (as a fuel), page 139, GCSE Combined Science; The Revision Guide, CGP, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782945725/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945725&linkCode=as2&tag=nrjc-21&linkId=694be7494de75af3349537d34e13f7f0 ''Hydrogen (as a fuel), pages 71, 89, GCSE Chemistry; The Revision Guide, CGP, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782948147/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948147&linkCode=as2&tag=nrjc-21&linkId=f63dcd8345f4e49c717b39a228a36c7c ''Hydrogen; as a fuel, pages 206, 207, 260, GCSE Chemistry, CGP, Edexcel '']
:[https://www.amazon.co.uk/gp/product/1782948147/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948147&linkCode=as2&tag=nrjc-21&linkId=f63dcd8345f4e49c717b39a228a36c7c ''Hydrogen; test for, page 126, GCSE Chemistry, CGP, Edexcel '']
====OCR====
:[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Hydrogen, pages 178-179, 186-187, Gateway GCSE Physics, Oxford, OCR '']