Metalloids are used as semiconductors in the electronics and computing industry. This type of brass is used in the manufacture of accessory materials for plumbing. Also, arsenic is added to alpha-brass to increase the resistance of zinc. Arsenic forms alloys with platinum and copper to increase its resistance to corrosion. The alloy of silicon, iron and aluminum is used for the production of very hard parts, which are used in the automotive industry. Such is the case of Duriron, which contains 14% silicon. Silicon is used in the production of alloys with greater resistance to acids. Antimony is used in alloys to produce bearings, accumulator plates and printing material. Tellurium is often added to cast iron to harden the surface layer of tempered parts. The addition of an amount of tellurium between 0.1% and 0.6% of an alloy with lead, increases its resistance to corrosion and traction with an increase in flexibility. This causes a higher hardness in the alloy used in the production of shot. Arsenic forms alloys with lead, producing a decrease in its melting point. In the production of higher quality materials In addition, it is used in the manufacture of the core of optical fibers for many applications. Germanium oxide is used in the manufacture of photographic camera lenses and microscope lenses. Silicon is the main base of the glass industry, involved in the manufacture of almost all glass objects. In the home, food can be baked using borosilicate glass, without causing the utensils used to break. In particular, borosilicate glass is resistant to temperature changes, which is why it is used in laboratories in chemical reactions and distillations. Boron is used in the production of glass and ceramics. Antimony is used to give glasses and enamels a yellow hue. Metalloid can be electrolytically deposited on silver producing a blackish finish. Tellurium is used in the production of blue, brown and red glasses. Boron, in the form of boric acid, is used as a mild antiseptic in the eyes, nose and throat. Also, other tellurium compounds are used as antimicrobial agents. Tellurium oxide has been used in the treatment of seborrheic dermatitis. Parasitic disease transmitted by the tsetse fly. Arsenic is part of Melarsoprol, a medicine used in the treatment of Human African Trypanosomiasis. A radioactive isotope of arsenic ( 74As) is used in the localization of cancerous tumors present in the human body. It is used in the preparation of Fowler's solution for use in the treatment of psoriasis. Arsenic is used in the treatment of Acute Promyelocytic Leukemia, a type of blood cancer. Arsenic is used as a wood preservative due to its toxicity to insects and fungi. Calcium arsenate is used to kill the cotton boll weevil. In addition, it is used to place it as a powder or in liquid solution on livestock to eliminate insects and parasites from the animal. Arsenic is used in agriculture as an insecticide and herbicide. Metalloids can behave like an acid or a base depending on the pH of the medium. They behave in a similar way to non-metals, they form oxacids like SiO 2 and they have an amphoteric behavior. Densitiesīoron 2.34 g / cm 3: Silicon 2.33 g / cm 3 Germanium 5.323 g / cm 3 Arsenic 5,727 Antimony 6.697 g / cm 3 Tellurium 6.24 g / cm 3 and Polonium 9.32 g / cm 3. Boiling pointsīoron 3,927 ° C Silicon 3,265 ° C Germanium 2,833 ° C Arsenic 614º C Antimony 1,587º C Tellurium 988º C and Polonium 962º C. Fusion Pointsīoron 2,076 ° C Silicon 1,414 ° C Germanium 938.25 ° C Arsenic 817 ° C Antimony 630.13 ° C Tellurium 449.51º C and Polonium 254º C. Arsenic and tellurium are classified as semi-metals. This group is made up of boron, silicon, germanium, and antimony. Metalloids are located on the periodic table on a downward diagonal between columns 13, 14, 15, 16, and 17, starting with boron in the upper left and ending with astatine in the lower right. Main characteristics of metalloids Situation on the periodic table However, a smaller group of researchers add polonium, astate (blue in color) and selenium (pink in color) to metalloids.Įven based on some properties, they suggest that the chemical elements carbon and aluminum (yellow in color) should also be considered as metalloids. The metalloids or semimetals are a group of chemical elements with intermediate physical and chemical properties between metals and non-metals.Most chemical researchers accept the following chemical elements as metalloids: boron, silicon, arsenic, germanium, antimony, and tellurium (shown in green in the image below). In the production of higher quality materials.Video: Properties and Uses of Metalloids Content
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |