The science of how Messi keeps the ball close to himself photo credit: ZaleDesigns Messi is a magician with the ball at his feet. He's in my opinion the best player in the sense that he can control the ball so well, runs so fast with the ball & changes the direction at full speed like it's a walk in the park. For starters he started playing very early (at 3) which is crucial if you want to be a good player. In that aspect, he's God gifted as he had dribble skills which is genetic in my opinion. Height He is short which means a low center of gravity so it's difficult to push him off the ball. That's why we see that anyone rarely can topple him down, instead players much larger than him lose possession to him. So his short height suits his style of play & is a blessing in disguise. Change of pace Messi changes his pace really well. He starts slow and runs directly at the defender which means the defender has to stop & focus on him. When he reac...
Chemistry - Metallurgy
The branch of science and technology that studies the properties of metals and their production and purification is known as metallurgy.
Naturally occurring solid inorganic substance is known as a mineral.
Naturally occurring solid material from which valuable mineral or metal can be extracted is known as ore.
The following table illustrates the major elements and their ores −
| Element | Ores | Chemical Composition |
|---|---|---|
| Aluminum | Bauxite | Al2O32H2O |
| Corundum | Al2O3 | |
| Kryolite | Na3AlF6 | |
| Dyspore | Al2O3.H2O | |
| Copper | Copper Pyrite | CuFeS2 |
| Malachite | 2CuCO3Cu(OH)2 | |
| Iron | Hematite | Fe2O3 |
| Magnetite | Fe3O4 | |
| Siderite | FeCO3 | |
| Sodium | Sodium Carbonate | Na2CO3 |
| Sodium Chloride | NaCl | |
| Sodium Nitrate | NaNO3 | |
| Sodium Sulphate | Na2SO4 | |
| Potassium | Potassium Chloride | KCl |
| Potassium Carbonate | K2CO3 | |
| Potassium Nitrate | KNO3 | |
| Magnesium | Magnesite | MgCO3 |
| Dolomite | CaMg(CO3)2 | |
| Epsom Salt | MgSO4 | |
| Calcium | Calcium Carbonate | CaCO3 |
| Tin | Cassiterite | SnO2 |
| Lead | Galena | PbS |
| Cerussite | PbCO3 | |
| Anglesite | PbSO4 | |
| Silver | Argentite | Ag2S |
| Tetrahedrite | Sb4S3 | |
| Zinc | Zinc Carbonate (known as calamine) | ZnCO3 |
| Zinc Sulphide | ZnS | |
| Mercury | Cinnabar | HgS |
| Manganese | Pyrolusite | MnO2 |
| Phosphorous | Phosphorite | Ca3(PO4)2 |
| Fluorapatite | Ca5 (PO4)3F | |
| Chlorapatite | 3Ca3(PO4)2.CaCI2 | |
| Gold | Calaverite | AuTe2 |
| Sylvanite | (Ag,Au)Te2 | |
| Nagyágite | (Pb5Au(Te, Sb)4S5-8) | |
| Petzite | Ag3AuTe2 | |
| Antimony | Stibnite | Sb2S3 |
| Stibiconite | (Sb3+ Sb25+O6(OH)) | |
| Cobalt | Cobaltite | CoAsS |
| Nickel | Pentlandite | ((Ni, Fe)S) |
| Chromium | Chromite | (FeCr2O4) |
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