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Given below are the melting points and atomic radii of three elements X, Y and Z of the periodic table having 'r' electrons in the outermost shells of their atoms -XYZMelting point (oC)100.597.563.5Atomic radii (Ao)1.331.541.96State four inference that can be drawn about the elements on the basis of the above data |
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Answer» (i) Since each element contains the same number of valence electrons, n in the outermost shells of their atoms, therefore X, Y and Z, belong to the same group. (ii) The atomic radii increase from X to Z so metallic character increases from X towards Z. (iii) X, Y and Z have melting points above 25oC (room temperature). Therefore, X, Y and Z are solid at room temperature. (iv) The ionization potential decreases from X to Z because they belong to the same group in the descending order. |
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