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In the following table, the positions of six elements A, B, C, D, E and F are given as they are in the Modern Periodic Table :Group→Period ↓123-121314151617182ABCD3EFOn the basis of the above table, answer the following questions :(i) Name the element which forms only covalent compounds.(ii) Name the element which is a metal with valency three.(iii) Name the element which is a non-metal with valency three.(iv) Out of B and C, whose atomic radius is bigger and why ?(v) Write the common name for the family to which theelements D and F belong. |
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Answer» (i) E (ii) B (iii) C (iv) B, because atomic radius decreases from left to right due to the increase in the nuclear charge. (v) Noble gases. |
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