(i) Explain the formation of ionic compound CaO with electron dot structure. Atomic number of calcium and oxygen are 20 and 8 respectively.
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a)Ca * * (2 electrons in valence shell) O * * * * * * (6electrons in valence shell)
then Ca - 2e------------ Ca2+
O + 2e---------------- O2-
Ca2++ O2----------------- CaO
b)copper and tin
then Ca - 2e------------ Ca2+
O + 2e---------------- O2-
Ca2++ O2----------------- CaO
b)copper and tin
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