Give reasons: (i) IE1of sodium is lower than that of magnesium whereasIE2of sodium is higher than that of magnesium. (ii) Noble gases have positive value of electron gain enthalpy.

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Rohit Kumar

IE1 of Sodium is less than magnesium because in the outermost orbit of sodium have only one electron and due to that force of attraction is less so it requires less energy to remove electron. But when it comes to IE2 of sodium , sodium have attended to configuration of 2 and 8 electrons , due to that...
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IE1 of Sodium is less than magnesium because in the outermost orbit of sodium have only one electron and due to that force of attraction is less so it requires less energy to remove electron. But when it comes to IE2 of sodium , sodium have attended to configuration of 2 and 8 electrons , due to that force of attraction is very high between the nucleus and outermost layer electron , so it requires higher energy than magnesium. read less
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