1) di stands for two
2) silicon has 4 valence electrons & oxygen has 2.
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Quartz is a natural form of silica, or silicon dioxide with the formula SiO2
SiO2 is a macromolecule. Each silicon atom is covalently bonded to four oxygen atoms and each oxygen atom is covalently bonded to two silicon atoms.
Glass is made (primarily) from Silicon Dioxide SiO2. However the molecule doesn't form discrete molecules but rather a continuous chain of hexagonal based structures. Glass is therefore one great big molecule and can't dissolve.
Our everyday glass is made of silica, a sand composed of silicon dioxide, silicon and oxygen.
Silicon DOES form double bonds. In fact, something like 70% of the Earth's crust is made of minerals containing double-bonded silicon... feldspar is the most abundant mineral in the Earth's crust, and it is mainly made of silicates. Silicates are silicon-oxygen compounds. Most commonly, silicon double bonded to two oxygens with another two single bonded oxygens (to make SiO4(2-)), but SiO2, silicon double bonded to 2 oxygens, is also fairly common.The reason why there are fewer double bonded compounds with bigger elements (ie, further down the table) is because double bonds are shorter than single bonds, forcing the atoms' nucleii closer together. In the case of bigger atoms, the large nucleii make this difficult.
Silica (silicon dioxide, SiO2)
Silicon and oxygen, in this form. SiO2 Silicon dioxide.
The formula SiO2 belongs to silicon dioxide. Another name for silicon dioxide is sand!
the formula for silicon dioxide is SIO2
The chemical formula of silicon dioxide is SiO2; SiO2 has many forms of crystalline structure.
Silicon dioxide SiO2
Silicon dioxide is a compound of the elements silicon and oxygen. Its chemical formula is SiO2. Impure Silicon dioxide is very common ; it is the sand on a beach.
Silicon dioxide is silica, SiO2.
The formula for Silicon Dioxide is SiO2SiO2
silicon dioxide
Silicon Dioxide
This compound is silicon dioxide - SiO2.