In the blockbuster film hit Back to the Future, which came out 30 years ago, and its sequels, this, 2015, is the future - the year Marty McFly and Doc Brown zoomed off to visit in their souped-up flying DeLorean.
Metallic bonding in magnesium. If you work through the same argument with magnesium, you end up with stronger bonds and so a higher melting point. Magnesium has the outer electronic structure 3s 2. Both of these electrons become delocalised, so the sea has twice the electron density as it does in sodium. The remaining ions also have twice the charge (if you are going to use this particular view of the metal bond) and so there will be more attraction between ions and sea.
Magnesium is a macro-mineral, which, unlike trace minerals, is needed by the body in large amounts. Calcium, sodium, and potassium are also macro-minerals. The average human body contains about 25 grams of magnesium, one of the six essential minerals that must be supplied in the diet.n its ionic form, magnesium has a positive charge, commonly noted as Mg 2+ . Magnesium cations function as a part of the structure of the body through their presence in bone. But arguably more important is their function as cell regulators in hundreds of chemical reactions throughout the body.