chlorine
The synonym for poisonous is toxic.
Mercury is an element and is very poisonous. It is not used as a drug.
no.
Chlorine, which was used as a poisonous gas in World War I.
It was the element Polonium :) does that help?
mercury
Not unless they contain a poisonous element.
neon
Lead is an element that is poisonous if ingested, causing a variety of health issues. It has been replaced in many applications, such as in paint and gasoline, with less harmful substances to reduce the risk of lead exposure and poisoning.
yes in the one of the wars the could throw a bomb or" poisonous gas" into the trenches of their opponents and kill them.
Plutonium is a very toxic element; also is a radioactive element.
Radon