As hard as a bird.
I don't know if Argon is hard or soft, that is why I am asking you, but apparently you won't give me the answer! >.< I'm guessing soft, but i dunno..
They are very rare (excepting argon) and also they are inert gases.
Argon is an element and all the atoms in argon are argon atoms.
The element Argon has 8 Isotopes argon-35, argon-36, argon-37, argon-38, argon-39, argon-40, argon-41 and argon-42.The stable isotopes of argon are:argon-36, 0.34%argon-38, 0.06%argon-40, 99.60%Of the radioactive isotopes argon-39 has the longest halflife at about 260 years, all the others have halflives measured in days or much less.
Curiously enough, the name of argon Is argon.
Argon is used to make argon
Argon is a noble gas. Argon gas is only composed of argon
Argon is dense and so collects close to the ground. In an enclosed space, it can fill up the lower level. It cab then cause death by asphyxiation. Because it is colourless and odourless it is hard to detect.