$(A), (B)$ and $(C)$ are elements in the third short period. Oxide of $(A)$ is ionic, that of $(B)$ is amphoteric and of $(C)$ a giant molecule. $(A), (B)$ and $(C)$ have an atomic number in the order:

(A) < (B) < (C)

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(C) < (B) < (A)

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(A) < (C) < (B)

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(B) < (A) < (C)

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Solution

The correct option is C $(A) < (B) < (C)$
Oxide of (A) is ionic. Alkali and alkaline earth metals form ionic oxides.

Oxide of (B) is amphoteric. It is aluminium oxide $A l_{2} O_{3}$ .

Oxide of (C) is a giant molecule. It is silicon dioxide $S i O_{2}$ .

(A), (B) and (C) have atomic number in the order (A) < (B) < (C).

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(A), (B) and (C) are elements in the third short period. Oxide of (A) is ionic, that of (B) is amphoteric and of (C) a giant molecule. (A), (B) and (C) have an atomic number in the order:

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