HardChemistry
+4 / -1
(A), (B) and (C) are elements in the second short period. Oxide of (A) is ionic, that of (B) is amphoteric and of (C) large a molecule. (A), (B) and (C) have atomic number in the order -
A
(A) < (B) < (C)
B
(C) < (B) < (A)
C
(A) < (C) < (B)
D
(B) < (A) < (C)
Explanation
In the second period, ionic oxide corresponds to Li/Be side, amphoteric oxide to BeO, and giant molecular/covalent oxide to non-metals toward the right. Therefore atomic number increases as A < B < C.
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