under the same conditions which one of the following atoms will liberate the largest amount of energy when it gains an electron?
1.Na(g) 2.Ar(g) 3.Li(g) 4.N(g) 5.Mg(g)
The Attempt at a Solution
I was told the answer's N 'cos it's the most electronegative atom out of the choices given but when we consider the electronic configurations of the above atoms Na & Li seems to attain a stable octet by gaining an electron so it would release a lot more energy than N which by gaining an electron becomes 2p4 which is far less stable than 2p3.
so I think its between Li & Na and since Li has a smaller covalent radius it would probably attract the electron more and so release more energy,am I right?