part =4 Major Metals
Total Questions: 50
Sodium and potassium metals are soft and can be easily cut with a knife. Sodium metal reacts rapidly with water to form sodium hydroxide and hydrogen gas. Sodium is kept immersed in kerosene oil.
Chalcocite is important copper ore. This metal is opaque with a luster and is black to brown in color
Pyrolusite (MnO2) is an ore of manganese. About 63.2% of manganese is found in this ore. The other ores of manganese are manganite [MnO(HO)].
Manganite [MnO (OH)] is an ore of manganese. About 62% of manganese is found in it.
Beryl is an ore of beryllium. Other ores of beryllium.
Phenakite - 42-45% beryllium
Bertrandite - 40-42% beryllium
Helbutrodite - 32-35% beryllium
Chrysoberyl - 18-20% Beryllium
Leucophanite - 10-12% Beryllium
Bauxite (Al₂ O₃ H₂O) is an ore of aluminium. In addition, another ore of aluminium is cryolite (Na₃AlF₆).
Kiserite (MgSO₄.H₂O) is an ore of magnesium (mineral).
Dolomite is an ore of magnesium metal (Mg). It is actually an anhydrous carbonate mineral composed of calcium magnesium carbonate [CaMg(CO₃)₂].
Pentlandite is an important ore of nickel. It is used for electroplating. Canada, Australia, and the USA are the major producing countries.sermut
Turquoise is an ore of copper. Some other ores of copper are chalcopyrite, cuprite, azurite and malachite, etc.
