Barium is used as a rat poison.
Barium is used for rat poison.
arsenic
arsenic
Arsenic.
Bromine
rat poisn tar tabbaco ectra lots of bad
Barium is used for rat poison.
iodine
Arsenic
arsenic
arsenic
arsenic
arsenic
Several. Arsenic was once used as a rat poison and also has use in medicine (bone marrow disorders as an example. Thallium was once used as a rat poison and was once used to treat Syphillis Barium used to be used in rat poison and is used in medicine (barium meal) for some types of scan. Mostly these days however it is a compound that applies to both rather than an element - that being Warfarin.
A common element used in rat poison is Arsenic, although there are other components such as zinc phosphide, bromethalin, and cholecalciferon. None of the last three, however, are single elements.
bromide
Arsenic is used in rat poison and is in the title "Arsenic and Old Lace."