Albertus Magnus is often credited with isolating this element around 1250; it's since been used as a poison
During the Bronze Age, arsenic often occurred as an impurity in bronze, and it ... 
Albertus Magnus is usually credited for being the first to isolate the... [DOC] [TLE] All Elements - Sheppard Software [PAR] The definition of acid has since been revised to not require oxygen in the ......