Magnesium is a chemical element with the symbol Mg, atomic number 12 and common oxidation number +2. It is an alkaline earth metal and the seventh most abundant element in the Earth's crust, where it constitutes about 2% by mass, and ninth in the known Universe as a whole. This dominance of magnesium is related to the fact that it is easily built up in supernova stars from a sequential addition of three helium nuclei to carbon (which in turn is made from three helium nuclei). Due to magnesium ion's high solubility in water, it is the third most abundant element dissolved in seawater.
Magnesium is the 11th most abundant element by mass in the human body. Its ions are essential to all living cells, where they play a major role in manipulating important biological polyphosphate compounds like ATP, DNA, and RNA. Hundreds of enzymes require magnesium ions in order to function. Magnesium is also the metallic ion at the center of chlorophyll, and is therefore a common additive to fertilizers. Magnesium compounds are used medicinally as common laxatives, antacids (i.e., milk of magnesia), and in a number of situations where stabilization of abnormal nerve excitation and blood vessel spasm is required (i.e., to treat eclampsia). Magnesium ions are sour to the taste, and in low concentrations help to impart a natural tart taste in fresh mineral waters.
The free element metal is not found naturally on Earth, as it is highly reactive once produced. It is coated in a thin layer of oxide, which partly masks this reactivity. When the metal burns it produces a characteristic brilliant white light, making it a useful ingredient in flares. The metal is now mainly obtained by electrolysis of magnesium salts that are obtained from brine. The chief use for magnesium is as an alloying agent to make aluminum-magnesium alloys, sometimes called "magnalium" or "magnelium". Since magnesium is less dense than aluminum, these alloys are prized for their relative lightness and strength.
Since magnesium has twelve protons, twelve neutrons and twelve electrons, an atomic model should be made with a nucleus containing the twelve protons and the twelve neutrons. Then it should consist of three energy levels on the first level should be two electrons then there should be eight electrons on the second level, and then the final two on the third level. The link below shows a diagram of an atomic model of magnesium.
Www.stkbla.blogspot.com/2010/10/lesson-8-continued-bohrs-model_22.html
Magnesium is the 11th most abundant element by mass in the human body. Its ions are essential to all living cells, where they play a major role in manipulating important biological polyphosphate compounds like ATP, DNA, and RNA. Hundreds of enzymes require magnesium ions in order to function. Magnesium is also the metallic ion at the center of chlorophyll, and is therefore a common additive to fertilizers. Magnesium compounds are used medicinally as common laxatives, antacids (i.e., milk of magnesia), and in a number of situations where stabilization of abnormal nerve excitation and blood vessel spasm is required (i.e., to treat eclampsia). Magnesium ions are sour to the taste, and in low concentrations help to impart a natural tart taste in fresh mineral waters.
The free element metal is not found naturally on Earth, as it is highly reactive once produced. It is coated in a thin layer of oxide, which partly masks this reactivity. When the metal burns it produces a characteristic brilliant white light, making it a useful ingredient in flares. The metal is now mainly obtained by electrolysis of magnesium salts that are obtained from brine. The chief use for magnesium is as an alloying agent to make aluminum-magnesium alloys, sometimes called "magnalium" or "magnelium". Since magnesium is less dense than aluminum, these alloys are prized for their relative lightness and strength.
Since magnesium has twelve protons, twelve neutrons and twelve electrons, an atomic model should be made with a nucleus containing the twelve protons and the twelve neutrons. Then it should consist of three energy levels on the first level should be two electrons then there should be eight electrons on the second level, and then the final two on the third level. The link below shows a diagram of an atomic model of magnesium.
Www.stkbla.blogspot.com/2010/10/lesson-8-continued-bohrs-model_22.html
