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valence shell
outer shell
ion
formed when an atom gains or loses electrons, resulting in a charged particle.
positive ion (cation)
an element that’s lost 1+ electrons
negative ion (anion)
an ion that’s gained electrons
ionic bond
when elements give/lose electrons to get a full outer shell
covalent bond
when elements share electrons to get a full outer shell
dot and cross diagrams
shows electron arangement