chlorine
an element that was used was chlorinethere are some others such as tear and mustard gas
chlorine
Chlorine, which was used as a poisonous gas in World War I.
Chlorine gas was used as a weapon during World War I. Salt is Sodium chloride.
The common poison gas of WWI was Mustard Gas, a combination of Sulfur and Chlorine (C4H8Cl2S).
An example of a gas element is helium, which is a noble gas commonly used in party balloons and airships.
nickel
It was chlorine.
It was chlorine.
Chlorine gas was used as a poisonous gas in World War 1. It was one of the first chemical weapons employed in warfare and caused significant casualties and suffering among soldiers on the battlefield.
argon
carbon