1.

Explain the formation of ionic compound CaO with electron-dot structure. Atomic numbers of calcium and oxygen are 20 and 8 respectively.

Answer»

Solution :Calcium has the electron distribution : 2, 8, 8, 2
OXYGEN has the electron distribution : 2, 6
Thus CA has 2 electrons in the outermost shell. Ca has the tendency to donate 2 electrons and oxygen has the tendency to GAIN 2 electrons FORMING an ionic bond. This can be REPRESENTED as under :


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