Question

calcium oxide by Criss cross valency








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Answer 1

Answer:

Calicum Atomic number is 20 and nearest noble gas is argon and atomic number of argon is 18 and then valency of calcium is 2 and oxygen atomic number is 8 and nearest noble gas is Neon and its atomic number is 10 then valency is 2 now cross multipy both and you get Cao

Answer 2

Answer:

Hope it helps... Plzzzz mark me as brainliest.. /\°°/\°°°

Simple and perfect