Inorganic Chemicals

Pure thallium is a bluish-white metal that is found in trace amounts in the earth's crust. In the past, thallium was obtained as a by-product from smelting other metals; however, it has not been produced in the United States since 1984. Currently, all the thallium is obtained from imports and from thallium reserves.. In its pure form, thallium is odorless and tasteless. It can also be found combined with other substances such as bromine, chlorine, fluorine, and iodine. When it's combined, it appears colorless-to-white or yellow.. Thallium is used mostly in manufacturing electronic devices, switches, and closures, primarily for the semiconductor industry. It also has limited use in the manufacture of special glass and for certain medical procedures.

Antimony powder appears as a silvery or gray solid in the form of dust. Denser than water and insoluble in water. Toxic by inhalation and by ingestion. May burn and emit toxic fumes if heated or exposed to flames. Used to make electric storage batteries and semiconductors.

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.