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==Key Stage 2=====Meaning===[[Lithium]] is a [[metal]].==Key Stage 3=====Meaning===[[File:LithiumSymbol.png|right|300px|thumb|The [[Chemical Symbol|chemical symbol]] for [[Lithium]].]][[Lithium]] is a [[Group 1]] [[element]] with an [[Atomic Number|atomic number]] of 3.===About Lithium===: [[Lithium]] has the [[Chemical Formula|chemical formula]] [[Lithium|Li]].: [[Lithium]] has 3 [[proton]]s and 4 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Atomic Number]] of 3 and an [[Relative Atomic Mass|atomic mass]] of 7.: [[Lithium]] is the least [[Reactivity|reactive]] [[Alkali Metal]].: [[Lithium]] [[Chemical Reaction|reacts]] strongly with [[water]] to produce [[Hydrogen]] [[gas]] and [[Lithium Hydroxide]].: [[Lithium]] is a [[solid]] (at [[Room TemperatureSTP|room temperature]]) .: An [[Group atom]] of [[Lithium]] has only 1[[electron]] in its [[Outer Shell|outer shell]] .: [[Lithium]] [metal[ion]]s have lost an [[electron]] to become [[Positive Charged|positively charged]].==Key Stage 4=====Meaning===[[Lithium]] is a [[Group 1]] [[element]] with 3 [[proton]]s in the [[Atomic Nucleus|nucleus]].===About Lithium===: [[Lithium]] has the [[Chemical Formula|chemical formula]] [[Lithium|Li]].: The most [[Stable Isotope|stable isotope]] of [[Lithium]] has 4 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 7.: [[Lithium]] is the least [[Reactivity|reactive]] [[Alkali Metal]].: [[Lithium]] [[Chemical Reaction|reacts]] strongly with [[water]] to produce [[Hydrogen]] [[gas]] and [[Lithium Hydroxide]].: [[Lithium]] is a [[solid]] at [[STP|standard temperature and pressure]] with a [[Melting Point|melting point]] of 180.50 [[Degrees Celsius|°C]].: An [[atom]] of [[Lithium]] has only 1 [[electron]] in its [[Outer Shell|outer shell]].: [[Lithium]] [[ion]]s have lost an [[electron]] to become [[Positive Charged|positively charged]].