Question

The Na+ion and the Ne atom are isoelectronic. The ease of loss of an electron by gaseous Ne atom, I1, has a value of 2081 kJ/mol. The ease of loss of an electron from a gaseous Na+ ion, I2, has a value of 4562 kJ/mol. Why are these values not the same?

Answer 1

both are stable & have their outermost e

−

in same shell.

Energy require Na

+

ion is more

∴ it contain one more proton in its nucleus which pulls outermost e

−

more properly then Ne.

for this we didnt need to remember its value just get an idea from options.