Which two chemists organized elements based on properties such as how the elements react or whether they are solid or liquid ?

The one who developed the periodic tables about forty years apart are Dmitri Mendeleev and Henry Moseley ...

Hope this helps

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

answer///terminator or twilight zone;