(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 numbers in the order of:
Correct answer: A. (A)<(B)<(C)
- A. (A)<(B)<(C)
- B. (C)<(B)<(A)
- C. (A)<(C)<(B)
- D. (B)<(A)<(C)
Explanation
A, B and C are magnesium, aluminium and silicon. Magnesium form ionic oxide, MgO; Aluminium forms amphoteric oxide, Al2O3 and silicon forms a giant molecule SiO2
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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