The atomic number of elements X,Y …
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Meghna Thapar 5 years, 9 months ago
As y is a nobles gas the group of y is 18th group or zero group
X=A-2, group of X is 16th group or VI A
Z=A+23,group of Y is 2nd group or IIA
(b) X→→ valency =2 (electronegative)
Z →→ valency =2 (elctropositive)
Hence the formula is ZX
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