What is mn on the periodic table

Data for this section been provided by the British Geological Survey. An integrated supply risk index from 1 very low risk to 10 very high risk. This is calculated by combining the scores for crustal abundance, reserve distribution, production concentration, substitutability, recycling rate and political stability scores. The percentage of a commodity which is recycled. A higher recycling rate may reduce risk to supply.

The availability of suitable substitutes for a given commodity. The percentage of an element produced in the top producing country. The higher the value, the larger risk there is to supply. The percentage of the world reserves located in the country with the largest reserves.

A percentile rank for the political stability of the top producing country, derived from World Bank governance indicators. A percentile rank for the political stability of the country with the largest reserves, derived from World Bank governance indicators. Specific heat capacity is the amount of energy needed to change the temperature of a kilogram of a substance by 1 K.

A measure of the stiffness of a substance. It provides a measure of how difficult it is to extend a material, with a value given by the ratio of tensile strength to tensile strain. A measure of how difficult it is to deform a material.

It is given by the ratio of the shear stress to the shear strain. A measure of how difficult it is to compress a substance. It is given by the ratio of the pressure on a body to the fractional decrease in volume. A measure of the propensity of a substance to evaporate. It is defined as the equilibrium pressure exerted by the gas produced above a substance in a closed system. This Site has been carefully prepared for your visit, and we ask you to honour and agree to the following terms and conditions when using this Site.

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Jump to main content. Periodic Table. Glossary Allotropes Some elements exist in several different structural forms, called allotropes. Discovery date Discovered by Johan Gottlieb Gahn Origin of the name The derivation of Manganese may have come from one of two routes: either from the Latin 'magnes', meaning magnet, or from the black magnesium oxide, 'magnesia nigra'.

Glossary Group A vertical column in the periodic table. Fact box. Glossary Image explanation Murray Robertson is the artist behind the images which make up Visual Elements.

Appearance The description of the element in its natural form. Biological role The role of the element in humans, animals and plants. Natural abundance Where the element is most commonly found in nature, and how it is sourced commercially. Uses and properties. Image explanation. The image is of an antique electromagnet and a cow. The electromagnet is because manganese may have got its name from the Latin word for magnet.

The cow reflects the importance of the element as a food supplement for grazing animals. Manganese is too brittle to be of much use as a pure metal. It is mainly used in alloys, such as steel. This is extremely strong and is used for railway tracks, safes, rifle barrels and prison bars. Drinks cans are made of an alloy of aluminium with 1. With aluminium, antimony and copper it forms highly magnetic alloys. Manganese IV oxide is used as a catalyst, a rubber additive and to decolourise glass that is coloured green by iron impurities.

Manganese sulfate is used to make a fungicide. Manganese II oxide is a powerful oxidising agent and is used in quantitative analysis. It is also used to make fertilisers and ceramics. Biological role. Manganese is an essential element in all known living organisms. When men are exposed to manganese for a longer period of time they may become impotent.

A syndrome that is caused by manganese has symptoms such as schizophrenia, dullness, weak muscles, headaches and insomnia. Because manganese is an essential element for human health shortages of manganese can also cause health effects.

These are the following effects: - Fatness - Glucose intolerance - Blood clotting - Skin problems - Lowered cholesterol levels - Skeleton disorders - Birth defects - Changes of hair colour - Neurological symptoms. Chronic Manganese poisoning may result from prolonged inhalation of dust and fume.

The central nervous system is the chief site of damage from the disease, which may result in permanent disability.

Symptoms include languor, sleepiness, weakness, emotional disturbances, spastic gait, recurring leg cramps, and paralysis. A high incidence of pneumonia and other upper respiratory infections has been found in workers exposed to dust or fume of Manganese compounds. Manganese compounds are experimental equivocal tumorigenic agents.

Manganese compounds exist naturally in the environment as solids in the soils and small particles in the water. Manganese particles in air are present in dust particles. These usually settle to earth within a few days. Humans enhance manganese concentrations in the air by industrial activities and through burning fossil fuels.

Manganese that derives from human sources can also enter surface water, groundwater and sewage water. Through the application of manganese pesticides, manganese will enter soils. For animals manganese is an essential component of over thirty-six enzymes that are used for the carbohydrate, protein and fat metabolism.

With animals that eat too little manganese interference of normal growth, bone formation and reproduction will occur. An invaluable source of facts and information as a Chemistry reference guide. Learn about what is Manganese with these fast facts These articles contain facts and information relating to Manganese and each of the other elements including the Periodic Symbol, group, classification, properties and atomic number which is often referred to as the Periodic Table Number.

Chemistry students will also find a helpful section on Chemical Formulas. What is the Element Manganese. Cookie Policy. By Linda Alchin. Manganese is a very hard, brittle, gray-white transition metal that is naturally found in a variety of minerals, but never on its own.

Manganese is one of the most common elements in Earth's crust and is widely distributed across the planet's surface. Manganese is vital to human and animal life in metabolic functions. Many alloys containing manganese are used in steel production, glass making, and even to make the aluminum in soda cans thinner and stronger. Manganese has been used since ancient times, science writer John Emsley wrote in an article in Nature Chemistry. Cave artists in France used the black ore manganese dioxide or pyrolusite at least 30, years ago.