Which correctly summarizes the trend in electron affinity?
it tends to be very high for group 2.
it tends to be more negative across a period.
it tends to remain the same across periods.
it tends to be more negative down a group.

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms

it is stable as it is in group 0 which have full outer shells of electrons

it is b that is the answer.