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The first ionisation energy (IE1) and second ionisation energy (IE2) of elements X, Y and Z are given below.ElementIE1(kj mol-1)IE2(kJ mol-1)X23705250Y5227298Z16803381Which one of the above elements is the most reactive metal, the least reactive metal and a noble gas? |
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Answer» Noble gases: Ioniation energy ranging from 2372 KJ mol-1 to 1037 kJ mol-1 . For element X, the IE1, value is in the range of noble gas, moreover for this element both IE1 and IE2 are higher and hence X is the noble gas. For Y, the first ionisation energy is low and second ionisation energy is very high and hence Y is most reactive metal. For Z, both IE1 and IE2 are higher and hence it is least reactive. |
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