Periodic Table and Technetium Essay Example

melting point of 2157oC and boiling point of 4265oC. Its liquid range covers 2108 K.

Technetium is a solid at 20oC and has a density of 11 g/cm-3. Its heat of vaporization is 582.2 kJ/mole, while its heat capacity at 25oC. Manganese, on the other hand, is more reactive to air but does not react with water. Technetium falls between rhenium and manganese on the periodic table and shares similarities with them. It can be dissolved in aqua regia, nitric acid, and concentrated sulfuric acid, but not in hydrochloric acid of any concentration.

The heat of fusion of Technetium is 24 kJ/mol. Technetium, a lab made element, has various purposes including radiation sources for medical research, radioactive tracing in medicine, nuclear medicine, corrosion inhibitor, and superconductor. Unlike naturally occurring radioactive elements found on earth and present in human bodies, Technetium does not exist naturally. It was discovered at the University of Palermo in Italy through the bombardment of molybdenum atoms with deuterons. Technetium has 34 isotopes which are all radioactive and none are stable.

Technetium-97, technetium-98, and technetium-99 are the three most stable isotopes of technetium, each with a half-life exceeding one million years. Among these isotopes, technetium-99m is particularly valuable for its various applications. It can be found in radioactive waste produced by defense-related government facilities, nuclear reactor and fuel cycle facilities, academic institutions, hospitals, and research establishments. This isotope is widely used in medical and research settings to assess the condition of organs like the heart, kidneys, lungs, liver spleen as well as bone health and blood flow studies (epa.gov). Originally called masurium and predicted by Mendeleev even before

its discovery,it holds historical significance as the first manmade element. Technetium-99m was initially discovered in a sample of molybdenum and is classified as a radioactive metal that does not occur naturally in human bodies.

I personally find technetium incredibly fascinating and have referred to it as "chemicool." This fascination was inspired by my teacher Karl Machin's classroom experience. Here are some sources I used for further information on technetium:
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There are two additional links about technetium that you might find helpful:
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