Question

First ionization enthalpy of two elements x and y is 500kJ mol-1 and 375 kJ mol-1. Comment about their respective position in a group as well as in a period.

Answer 1

As we know Ionisation enthalpy decreases down the group and increases across the period, therefore the position of x will be above y and the position of x will be right side of y.

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Answer 2

As the ie of element x is more than that y therefore element x comes after element y in the periodic table