Argon is the element i picked for the project. Argon is a chemical element with symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas. Argon is the most abundant gas in the earth's atmosphere. It makes up 1.28% of the atmosphere. It was one of the first noble gases to be discovered. It is a colorless, odorless, and non-toxic material in all three of its states. Henry cavendish proposed in 1785 that argon might exist. Lord rayleigh and sir william ramsay actually discovered and named it argon in 1894. Argon burns blue, so it is used in what is typically referred to as neon lighting. It can be used to cool the heads of heat seeking missiles. It gets its name from greek word lazy. There are 22 known isotopes
