Trends for electron affinity going across the group increases negatively.
Does this mean Noble gases's electron negativity is more negative than halogens ?
I'm confuse here .
Noble gases should have a positive electron affinity as adding an electron would make it unstable and thus , will not form.
But for halogens , their attraction for that 1 electron to fill up the p subshell is very strong.
But according to the theory that electron affinity increase negatively across the period, does this theory has an exception of noble gases ?
Next , what about Be and Mg ? Their electron affinities are not negative .