Question

Fill in the blanks:

$NaCl$ an electrovalent compounds is formed as a result of tranfer of ___ [one,two, three] valence electrons from metallic sodium to non-metallic chlorine atom. $CaO$ is similarly formed as a result of transfer of ____ [one, two, three] valence electrons from metallic calcium to non-metallic oxygen and magnesium chloride by transfer of ____ [one, two, three] valence electrons from ____ [one, two] magnesium atom/s to ____ [one, two] chlorine atom/s.

Answer 1

$NaCl$ an electrovalent compound is formed as a result of transfer of one valence electrons from metallic sodium to the non-metallic chlorine atom. $CaO$ is similarly formed as a result of transfer of two valence electrons from metallic calcium to non-metallic oxygen and magnesium chloride by transfer of two valence electrons from one magnesium atom/s to two chlorine atom/s.
$Na-2,8,1$
$Ca-2,8,8,2$
$Mg-2,8,2$
$Cl-2,8,7$