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Why is there an allotrope of silicon with the same structure as diamond but no allotrope of silicon with the same structure as graphite?
Bakasurvivor
Because they have different properties.
Wiki User
∙ 13y ago
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What is the symbol of diamond silicon and graphite?
Diamond and Graphite are allotropes of Carbon [chemical symbol: C]The chemical symbol of Silicon is Si.
What substance is an example of a network solid?
An example is the boron nitride. Another is silicon dioxide.
Why diamond has a higher melting point than silicon carbide?
The bond energy of Si -C is generally considered to be lower than that of the C-C, so a simple explanation is that diamond has a stronger bond. Both diamond and silicon carbide have a three dimensional network structure. Diamond consists of tetrahedral bonded carbon atoms whereas silicon carbide has many polymorphs (crystal structure which are temperature dependant). As you heat silicon carbide up the crystal structure changes. Silicon carbide does not melt "congruently" to give a liquid of the same composition, it decomposes at around 2700 0C .
Is graphite a silicate?
No a silicate is a compound containing silicon and oxygen. Graphite is pure carbon.
Why are covalent-network substances poor electrical conductors?
There is generally a lack of free electrons to conduct electricty. For example diamond (an allotrope of carbon) and silicon dioxide, which are very poor conductors. . Some network covalent t are semiconductors- like silicon- which mean that they can conduct but poorly.
What is diamond and silicon?
what is graphite
What is the symbol of diamond silicon and graphite?
Diamond and Graphite are allotropes of Carbon [chemical symbol: C]The chemical symbol of Silicon is Si.
Is a diamond composed of oxygen and silicon?
The diamond is a crystallized, allotrope form of pure carbon.
What substance is an example of a network solid?
An example is the boron nitride. Another is silicon dioxide.
What is the resemblance of structure of Silicon Carbide to diamond?
both of these are bonded to C-atom.
Why graphite conducts electricity but silicon carbide does not?
Because graphite has one free electron that is not involved in bonding. The one delocalized electron can be used to conduct electricity. However silicon carbide is tetrahedrally bonded to 4 carbon atoms. There is not free electrons in the arrangement. With no delocalized electron, silicon carbide is unable to conduct electricity langetmami.com
Is silicon an allotrope of carbon?
No silicon is an element in the same group as carbon, it has similar chemical properties but it is not carbon.
Why diamond has a higher melting point than silicon carbide?
The bond energy of Si -C is generally considered to be lower than that of the C-C, so a simple explanation is that diamond has a stronger bond. Both diamond and silicon carbide have a three dimensional network structure. Diamond consists of tetrahedral bonded carbon atoms whereas silicon carbide has many polymorphs (crystal structure which are temperature dependant). As you heat silicon carbide up the crystal structure changes. Silicon carbide does not melt "congruently" to give a liquid of the same composition, it decomposes at around 2700 0C .
What is the hardest mineral in this group?
Silicon Dioxide (known as Quartz) is not the hardest mineral, the hardest mineral is an allotrope of carbon called diamond. Quartz is only the 7th hardest mineral.
Is quartz an allotrope of carbon?
When an elemnt has more than one form, where the atoms are bonded together differently these forms are called allotrpes. Carbon has a number of allotrpes, the best known are diamond and graphite. Other elements have allotropes such as phosphorus where ther are red phosphorus, white phosphorus black phosphorus and violet phosphorus.
Is graphite a silicate?
No a silicate is a compound containing silicon and oxygen. Graphite is pure carbon.
Are diamonds formed from compressed sand?
No. Sand and diamond are completely different in composition. Sand is mostly quartz (silicon dioxide) while diamond is almost pure carbon. Compressed dand will form sandstone. Diamond is formed from compressed graphite.
