Asymmetries cause other atoms to arrange themselves

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Asymmetries cause other atoms to arrange themselves to develop weak opposite  charges—causing an attraction (bonding) Carbon atoms under low pressures develop weak van der Waals bonds between layers  of covalently bonded carbon (c) atoms this forms the mineral graphite. The mica minerals muscovite and biotite develop layers (sheets) of silica that are  bonded together by van der Waal’s  bonds Metallic bonding—occurs when the outermost electrons wander freely through elements  classified as metals. Meal consists of cation s held together by the moving negatively- charged electrons Free electrons can move rapidly in response to electric fields, hence metals are good  conductor of electricity. Silicate Minerals The silica tetrahedron Silicate minerals are the most important group of rock-forming minerals They have a building block 4 oxygen (O) atoms bonded to on  silicon (Si) atoms- this  structure is called the silica tetrahedron Oxygen is an anion with a net charge of 2- Silicon (Si) is cation with a net charge of 4- Silica tetrahedron is four ) atoms surrounding one Si atom the net charge on this  tetrahedron is 4-. Tetrahedron is 4-sided object Structures of silicate minerals
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