Q21 of 52 Page 38

Which of the following elements will form an acidic oxide?

Non-metals form acidic oxides. The element with atomic number 7 is a non-metal (nitrogen). All others are metals.

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The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?

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Which one of the following depict the correct representation of atomic radius(r) of an atom?