Question

2 Which of the following elements will form an acidic oxide? 1 i) An element with atomic number 7 ii) An element with atomic number 3 iii) An element with atomic number 12 iv) An element with atomic number 19

Answer 1

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So, element with atomic number 7 (electronic configuration 2,5) with is non-metal (N) and it will form an acidic oxide. Rest three elements atomic numbers, 3(Li),12 (Mg) and 19 (K) are metals and hence form basic oxides