Asked by lil meow meow

Why do the elements in groups 1A and 2A not share electrons in a covalent bond?
Answered by DrBob222
As a example look at NaCl. Energetically it is more feasible for Na to lose its lone outside electron (leaving the next lower shell filled) and transfer it to the chlorine atom to make its outside shell completely filled than it is to share 8 electrons as a quadruple bond between Na and Cl. As an ionic bond with the electron transferred we see
..
:Na:]^+
..
+
..
:Cl:]^-
..
or
Na::::Cl
Sorry. With the computer that's the best I can do.
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