Ions

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[tdani016]

A science fiction novel proposes the existence of the Ra-2 ion.  Using current chemical theory, discuss whether such an ion is likely to exist.

[SchoolBoyDJ]

Grab a periodic table.  You'll see that Ra is located in group 2.  What do all atoms want?  An octet, because of its stable nature.  The easiest way for a group 2 atom to obtain an octet is for it to LOSE 2 electrons, and hop down to a lower energy level.   Losing electrons is illistrated by a + charge.  Ra2+ may exist, but it's highly unlikely that Ra2- would.  (You're opening up a whole new orbital with those extra electrons, which amounts to a higher energy, less stable ion)