Give three main difference between covalent and electrovalent on element x with electronic configuration 2,8,2 ionises to a configuration of 2,8 when it combines with another element of configuration 2,8,7

Give three main difference between covalent and electrovalent on eleme

1.	Give three main difference between covalent and electrovalent on element x with electronic configuration 2,8,2 ionises to a configuration of 2,8 when it combines with another element of configuration 2,8,7
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