Question

Atomic number of calcium is 20 and of oxygen is 8. State the number of electrons calcium loses and oxygen gains to attain stable electronic configuration of the nearest Noble gas- during the formation of electrovalent molecule, calcium oxide

Answer 1

calcium configuration = 2,8,8,2
oxygen configuration = 2,6
therefore calcium loses 2 electron and oxygen gains 2 electrons to attain stable electronic configuration

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Answer 2

Answer:

Explanation:

calcium = 2,8,8,2

oxygen = 2,6

so, calcium looses TWO electrons and oxygen gains TWO electrons.

this is how they gain stable electronic configuration.

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