1. Tardigrade
  2. Question
  3. Chemistry
  4. (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 atomic number in the order :

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Q. $(A)$, $(B)$ 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 atomic number in the order :

Classification of Elements and Periodicity in Properties

Solution:

$A$, $B$ and $C$ are magnesium, aluminium and silicon. Magnesium forms ionic oxide, $(MgO)$ aluminium forms amphoteric oxide, $(Al_2O_3)$ and silicon forms a giant molecule $(SiO_2)$.