Political stability of top producer A percentile rank for the political stability of the top producing country, derived from World Bank governance indicators.
This is where the artist explains his interpretation of the element and the science behind the picture. Magnesium hydroxide milk of magnesia , sulfate Epsom salts , chloride and citrate are all used in medicine. Shear modulus GPa.
Fact box. Young's modulus GPa.
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Glossary Image explanation Murray Robertson is the artist behind the images which make up Visual Elements. A measure of how difficult it is to deform a material.
French chemist Marguerite Perey discovers francium. It is defined as the equilibrium pressure exerted by the gas produced above a substance in a closed system.
Block Elements are organised into blocks by the orbital type in which the outer electrons are found. Magnesite is heated to convert it to magnesia MgO , and this has several applications: German physicist Friedrich Ernst Dorn discovers radon. At the end of its useful life the magnesium in all these products can be recycled at very little cost.
Temperature K. English clergyman William Gregor discovers titanium. Reaction between aluminium and iodine. These alloys are useful in aeroplane and car construction.