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op,41 ,50 ,652 yuuuunium (Gd). The first...

op,41 ,50 ,652 yuuuunium (Gd). The first (AH,) and the second (4:H2) ionization Question 31. The first (4:H) and the sea (in kJ mol-') and the (Ae H) electron gain enthalpy (in kJ mol-1 15270 enthalpies (in kJ mol-1) and it of a few elements are given below: Elements Eon of s-, po, de AH AH, 7300 II III 520 419 1681 1008 2372 3051 3374 1846 5251 1451 de H -60 - 48 – 328 - 295 +48 VI 738 -40 ter electronic Which of the above elements is likely to be (a) the least reactive element (b) the most reactive metal (c) the most reactive non-metal (d) the least reactive non-metal (e) the metal which can form a stable binary halide of the formula MX2(X = halogen) (f) the metal which can form a predominantly stable covalent halide of the formula MX (X = halogen)? Solution ast electron

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