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How are lithium and iodine alike and different

User GSala
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there all different chemicals and have different reactions to different things
User Yulissa
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Lithium and iodine are alike in the sense that they both are only one electron away from having a completed valence electron shell. Lithium only needs to loose 1 electron while iodine only needs to gain 1 electron.

Lithium and iodine are different due to the fact that lithium needs to loose 1 electron therefore having a low electronegativity while iodine only needs to gain 1 electron therefore having a high electronegativity. This difference in electronegativity causes the two elements to react in different ways and have the ability to form different compounds.

I hope this helps. Let me know if anything is unclear.
User Jeroen Doppenberg
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