(X), (Y), (Z) are elements in third short period. Oxide of (X) is ionic, (Y) is amphoteric and (Z) is a giant molecule. (X), (Y) and (Z) will have atomic number in the order:
Moderate
Solution
Hence, the atomic number of (Z) > (Y) > (X).
Get Instant Solutions
When in doubt download our app. Now available Google Play Store- Doubts App