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Magnesium (Mg) M
Magnesium (Mg)
Element 12 on the periodic table. A silvery-white, soft and reactive member of the alkaline-earth metals (group 2 elements).
It is the eighth most common element in the Earth’s crust. Magnesium is also important in the human body. It is the lightest metal that is common in construction and is widely used in aircraft and space vehicles.
It is alloyed with aluminium, zinc and manganese to improve their strength.
Compounds of magnesium are medicines, such as epsom salts (magnesium sulphate) and milk of magnesia (magnesium carbonate).
Magnesium was discovered in 1808 by English scientist Sir Humphry Davy.
Scheele, manganese mainly is used to make steel easier to work. Manganese steel is also hard wearing and corrosion resistant.
Mass
The amount of matter in an object. In everyday use the word weight is often used to mean mass.
Matter
Anything that takes up space.
Meitnerium (Mt)
Element 109 on the periodic table. An artificially produced radioactive element, also called unnilennium (Une), belonging to the transition metals. It is a transuranium element discovered in 1982 at the Institute for Heavy Ion Research in Germany when bismuth-209 was bombarded with iron-58 ions. Only a single nucleus of the element has so far been produced.
 Magnesium – The mineral dolomite is a carbonate of magnesium and calcium.
Malleable
Able to be beaten or rolled into a new shape. Applies to metals. (See also: Ductile.)
 Magnesium – Magnesium is the most reactive of the metals that can be used
in everyday applications. When a taper of magnesium ribbon is lit, it rapidly bursts into flame, giving out a bright white light. This is used in signal flares.
Manganese (Mn)
Element 25 on the periodic table. A silvery-white, hard, brittle metal belonging to the transition metals.
Discovered in 1774 by the Swedish chemist Carl Wilhelm
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