Inorganic Chemicals

The chemical symbol of argon is ar, the atomic order is 18, which is located in group 18 of the periodic table. It is a rare gas. Argon accounts for 0.934% (9340 ppmv) of the atmospheric volume. It is the third largest gas in the earth's atmosphere, more than twice that of water vapor (about 4000 ppmv on average, but with great changes), 23 times that of carbon dioxide (400 ppmv) and more than 500 times that of neon (18p chemical Book PMV). Argon is the most abundant inert element in the crust, accounting for 0.00015% in the crust. There are 14 known isotopes of argon, including argon 33 to argon 46. Most of the argon in the earth's atmosphere is argon-40 (from the decay of potassium-40 in the earth's crust). Argon-36 is the most common argon isotope in the universe because it is the most easily produced by supernova nuclear fusion.

Arsenic is a naturally occurring element widely distributed in the earth's crust. In the environment, arsenic is combined with oxygen, chlorine, and sulfur to form inorganic arsenic compounds. Arsenic in animals and plants combines with carbon and hydrogen to form organic arsenic compounds. Inorganic arsenic compounds are mainly used to preserve wood. Copper chromated arsenic (CCA) is used to make "pressure-treated" lumber. CCA is no longer used in the U.S. for residential uses; it is still used in industrial applications. Organic arsenic compounds are used as pesticides, primarily on cotton plants.

Aluminum flux, fusible agent, electroplating, nickel plating, deoxidizer, cadmium gas lamp, electrode, photocell, solar ultraviolet photometry.

It can be used to make alloy, flint, etc

Uranium is a radioactive element with atomic symbol U, atomic number 92, and atomic weight 238.