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What is the formula of the compound

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in Chemistry by (269 points)

 X =1s2 2s2 2p6 3s2 3p6 4s2

Y= 1s2 2s2 2p6 3s2 3p5

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'X' is Calcium (Ca) with E-Configuration (2, 8, 8, 2).

'Y' is Chlorine (Cl) with E-Configuration (2, 8, 7).

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