I believe this will help you.
http://www.nairaland.com/703151/why-did-islam-not-spread
To become an ion, it just needs to gain extra electrons or lose the one electron that it has. To become part of a molecule, it just needs to bond with another atom and share electrons with it.
<span>a thickened and hardened part of the skin or soft tissue, especially in an area that has been subjected to friction.</span>