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==Key Stage 2=====Meaning===[[Potassium]] is a [[metal]].==Key Stage 3=====Meaning===[[File:PotassiumSymbol.png|right|300px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Potassium]].]][[Potassium]] is a [[Group 1]] [[element]] with an [[Atomic Number|atomic number]] of 19.===About Potassium===: [[Potassium]] has the [[Chemical Formula|chemical formula]] [[Potassium|K]].: [[Potassium]] has 19 [[proton]]s and 20 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Atomic Number]] of 19 and an [[Relative Atomic Mass|atomic mass]] of 39.: [[Potassium]] is a more [[Reactivity|reactive]] [[Alkali Metal|alkali metal]] than [[Sodium]] but less [[Reactivity|reactive]] than [[Rubidium]].: [[Potassium]] is more [[Reactivity|reactive]] than [[Carbon]] on the [[Reactivity Series|reactivity series]] so it must be [[Extraction of Metals|extracted]] from its [[ore]] using [[electrolysis]].: [[Potassium]] [[Chemical Reaction|reacts]] strongly with [[water]] to produce [[Hydrogen]] [[gas]] and [[Potassium Hydroxide]].: [[Potassium]] is a [[solid]] (at [[Room TemperatureSTP|room temperature]]) .: An [[Group atom]] of [[Potassium]] has only 1[[electron]] in its [[Outer Shell|outer shell]].: [[Potassium]] [[ion]]s have lost an [[electron]] to become [[metalPositive Charged|positively charged]].==Key Stage 4=====Meaning===[[Potassium]] is a [[Group 1]] [[element]] with 19 [[proton]]s in the [[Atomic Nucleus|nucleus]].===About Potassium===: [[Potassium]] has the [[Chemical Formula|chemical formula]] [[Potassium|K]].: The most [[Stable Isotope|stable isotope]] of [[Potassium]] has 20 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 39.: [[Potassium]] is a more [[Reactivity|reactive]] [[Alkali Metal|alkali metal]] than [[Sodium]] but less [[Reactivity|reactive]] than [[Rubidium]].: [[Potassium]] is more [[Reactivity|reactive]] than [[Carbon]] on the [[Reactivity Series|reactivity series]] so it must be [[Extraction of Metals|extracted]] from its [[ore]] using [[electrolysis]].: [[Potassium]] [[Chemical Reaction|reacts]] strongly with [[water]] to produce [[Hydrogen]] [[gas]] and [[Potassium Hydroxide]].: [[Potassium]] is a [[solid]] at [[STP|standard temperature and pressure]] with a [[Melting Point|melting point]] of 180.50 [[Degrees Celsius|°C]].: An [[atom]] of [[Potassium]] has only 1 [[electron]] in its [[Outer Shell|outer shell]].: [[Potassium]] [[ion]]s have lost an [[electron]] to become [[Positive Charged|positively charged]].