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→Key Stage 4
===About Electrons===
: [[Electron]]s have a [[Relative Atomic Charge|relative atomic charge]] of -1 and a [[Relative Atomic Mass|relative atomic mass]] of 1/18601840.
: The [[electron]]s and their [[Electron Orbital|shells]] are responsible for the chemistry of an [[atom]].
: When [[atom]]s [[bond]] to form [[molecule]]s some [[atom]]s can share their [[electron]]s forming a [[Covalent Bond]], some transfer an [[electron]] from one [[atom]] to another forming an [[Ionic Bond]] while others allow [[electron]]s to pass freely between many [[atom]]s forming a [[Metallic Bond]].