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Silica, sand is a giant molecule , each silicon atom is bonded to four oxygen atoms each oxygen is bonded to two silicon atoms. The bonding is covalent and due to the difference in electronegativity (1.54) is polar covalent.
This is very different different from carbon dioxide which is molecular, a gas, where the molecule is linear with pi bonding. One possible explanation is that overlap between the carbon 2p and the oxygen 2p orbitals is better than the overlap between the 3p of silicon and the 2p of oxygen and this favours the giant molecule over the molecular form.
Sand is usually silica "contaminated" with oxides such as iron (III) oxide and is probably better described as a silicate. Pure silica is colourless. Sand varies from the "sandy" colour to black.
The giant molecular structure explains the very high melting point of silica.
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoCovalent Bond
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What type of bonding is present in a network solid?
covalent
What type of bonding is present in boron?
Covalent Bond
What type of bonding is present in a fluorine molecule?
Metallic.
Which type of bonding is present in iron?
Metallic bond as iron is a metal.
What type of bonding is present in cacl2?
Calcium chloride is consists of ionic bonds.
What type of bonding is present in a network solid?
covalent
What type of bonding is present in boron?
Covalent Bond
What type of bonding is present in a fluorine molecule?
Metallic.
Which type of bonding is present in iron?
Metallic bond as iron is a metal.
What type of bonding is present in cacl2?
Calcium chloride is consists of ionic bonds.
What is the formula for Si and O?
Add: Silicon monoxide is SiO, which does exist. You can do a Google search and find it in Wikipedia.Well technically silicon oxide doesn't exist, the formula is SiO2, which is silicon dioxide.
What type of bonding is present between water molecules?
polar covalent bonds make the water molecule and hydrogen bonding attracts other water molecules to each other
What is an A-type granite?
A-Type Granitoids are granites of anorogenic origin with high in SiO2 they can contain up to 77% SiO2 they have high alkalies and form on stable craton environment
When a Compound boils at a very low temperature and dissolves in water to give an alkaline solution what type of bonding is present?
Metallic
What type of bonding holds the two strands of DNA together and why is this important?
hydrogen bonding between the two bases present on two strands of dna hold the two strands. If there was no hydrogen bonding then doublex helix structure of dna would not be possible
What type of bonding does sulphur have?
covalent bonding
What is permeability in sand casting?
This allows the gases and steam to escape from the mold during casting. The grain size, shape and distribution of the foundry sand, the type and quantity of bonding materials, the density to which the sand is rammed, and the percentage of moisture used for tempering the sand are important factors in regulating the degree of permeability.
