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[[Barium]] is a [[Group 2]] [[element]], on the [[Periodic Table]], with an [[Atomic Number|atomic number]] of 56.
===About Barium===
====Molecular Structure====: [[Barium]] has the [[Chemical FormulaSymbol|chemical formulasymbol]] [[Barium|Ba]].: [[Barium]] [[atom]]s join together in large numbers to form a giant [[metal]] [[molecule]].====Atomic Structure====
: [[Barium]] as 56 [[proton]]s and 81 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Atomic Number]] of 56 and an [[Relative Atomic Mass|atomic mass]] of 137.
: An [[atom]] of [[Barium]] has only 2 [[electron]]s in its [[Outer Shell|outer shell]].
====Properties====
: [[Barium]] is a more [[Reactivity|reactive]] [[Alkali Earth Metal|alkali earth metal]] than [[Strontium]] but less [[Reactivity|reactive]] than [[Radium]].
: [[Barium]] 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]].
: [[Barium]] [[Chemical Reaction|reacts]] strongly [[water]] to produce [[Hydrogen]] [[gas]] and [[Barium Hydroxide]] and strongly with [[acid]] to produce [[Barium]] [[salt]]s.
: [[Barium]] is a [[solid]] at [[STP|room temperature]].
==Key Stage 4==
===Meaning===
[[Barium]] is a [[Group 2]] [[element]], on the [[Periodic Table]], with 56 [[proton]]s in the [[Atomic Nucleus|nucleus]].
===About Barium===
====Molecular Structure====: [[Barium]] has the [[Chemical FormulaSymbol|chemical formulasymbol]] [[Barium|Ba]].: [[Barium]] [[atom]]s join together in a [[Giant Metallic Structure|giant metallic structure]].====Atomic Structure====
: The most [[Stable Isotope|stable isotope]] of [[Barium]] has 81 [[neutron]]s in its [[Atomic Nucleus|nucleus]] giving it an [[Relative Atomic Mass|atomic mass]] of 137.
: An [[atom]] of [[Barium]] has only 2 [[electron]]s in its [[Outer Shell|outer shell]].
: [[Barium]] [[ion]]s have lost two [[electron]]s to become [[Positive Charged|positively charged]].
====Properties====
: [[Barium]] is a more [[Reactivity|reactive]] [[Alkali Earth Metal|alkali earth metal]] than [[Strontium]] but less [[Reactivity|reactive]] than [[Radium]].
: [[Barium]] 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]].
: [[Barium]] [[Chemical Reaction|reacts]] strongly with [[water]] to produce [[Hydrogen]] [[gas]] and [[Barium Hydroxide]] and strongly with [[acid]] to produce [[Barium]] [[salt]]s.
: [[Barium]] is a [[solid]] at [[STP|standard temperature and pressure]].