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Carbon is a non-metal with a fairly small atomic radius close to that of oxygen. Carbon dioxide consists of molecules in which a single carbon atom is double-bonded to two oxygen atoms. As CO2 is a relatively small, nonpolar molecule it is a gas.
Silicon itself is a metalloid with a relatively large atomic radius while oxygen has a much smaller atomic radius. Due to this difference in size silicon does not easily form double bonds with oxygen. Instead of forming a molecular gas, SiO2 forms a covalent network. In this network each silicon atom is single bonded to four oxygen atoms and each oxygen atom is single bonded to two silicon atoms.
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∙ 13y ago
Wiki User
∙ 13y agoCarbon is a nonmetal with a fairly small atomic radius close to that of oxygen. Carbon dioxide consists of linear molecules in which a single carbon atom is covalently double-bonded to two oxygen atoms. As CO2 is a relatively small, non-polar molecule it is a gas.
Silicon itself is a metalloid with a relatively large atomic radius while oxygen has a much smaller atomic radius. Due to this difference in size silicon does not easily form double bonds with oxygen.
Instead of forming a molecular gas, SiO2 forms a more ionic network (crystalline: quarts. In this network each silicon atom is single bonded to four oxygen atoms and each oxygen atom is single bonded to two silicon atoms.
Added: It also is less electronegative (1.75, comparable with Cu and Sn) than carbon, so the difference with oxygen (3.5) is bigger, thus bonds are more of ionic character.
(The lower you 'go' in the Periodic Table, elements become less nonmetallic, so the more metallic / ionic character you'll find: in group IV: C>Si>Ge>Sn>Pb)
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∙ 11y agoSee similar question/answer. No two compounds have identical melting points. Therefore there must always be a temperature at which one is solid and one is not. For these two, there is a moderately wide range of temperatures around room temperature where this happens.
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∙ 12y agocarbon has no vacant d orbital, has small size and there is very effective overlap between 2p orbital of C and 2p orbital of O2. so it exist as gas molecule because of its small size.
whereas Si having vacant d orbital which exist as network as:
Wiki User
∙ 13y agoCO2 consists of individual molecules with one central carbon atom double bonded to two oxygen atoms.
Silicon does not form double bonds with oxygen easily because of differences in the atomic radii. Because of this SiO2 does not form individual molecules but instead forms a network solid, with each silicon atom single bonded to four oxygen atoms and each oxygen atom single bonded to two silicon atoms. As a result, the particles in SiO2 are not free to move as they are in CO2.
Wiki User
∙ 9y agoCO2 forms individual molecules in which one carbon atom is covalently double bonded to two oxygen atoms. Because these molecules are relatively small and have no dipole moment CO2 is a gas.
Because of its larger atomic radius, silicon cannot form double bonds with oxygen as easily as carbon can.
As a result, in stead of forming molecules SiO2 forms a covalent network in which each silicon atom is single boned to four oxygen atoms and each oxygen atom is bonded to two silicon atoms. Because of this structure the atoms in SiO2 are fairly firmly locked in place.
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Why are nonmetal compounds gases at room temperature?
very few compounds of either metals or nonmetals are gasses at room temperature.for example lets look at the oxides of semiconductors:carbon - CO2, gassilicon - SiO2, solidgermanium - GeO2, solid
Does CO2 make a molecular solid?
Not at room temperature. But it is a molecular solid at temperatures below -78 degrees Celsius.
WILL liquid co2 boil at room temperature?
CO2 will not be a liquid at room temperature, rather a gas. It is only a liquid when compressed. Actually IF contained at high pressure it will be a liquid at room temperature ...It requires a combination of both pressure and temperature. It is a liquid in CO2 fire extinguishers and when the pressure is released some of it boils, absorbing a large amount of heat energy, more of it is released from the nozzle as a solid which then sublimes to forma gas.
Name and describe the phase change that occurs when dry ice is placed in an opened container at room temperature?
Dry ice (solid CO2) at room temperature changes from a solid to a gas without going through the liquid phase. This is called sublimation.
What differences are there between CO2 and H2O?
Carbon dioxide is at room temperature a gas; a gas can be liquefied to obtain the liquid form. It is possible also to obtain a gas in solid form (at very low temperatures) and the carbon dioxide is not an exception.
Why are nonmetal compounds gases at room temperature?
very few compounds of either metals or nonmetals are gasses at room temperature.for example lets look at the oxides of semiconductors:carbon - CO2, gassilicon - SiO2, solidgermanium - GeO2, solid
why CO2 is gas while SiO2 is solid at room temperature?
The difference in physical states between carbon dioxide (CO2) and silicon dioxide (SiO2) at room temperature can be attributed to the nature of their chemical bonds and the molecular structures. Carbon dioxide (CO2) is a linear molecule consisting of one carbon atom bonded to two oxygen atoms. The carbon-oxygen double bonds in CO2 are relatively strong, but they are still considered as covalent bonds. In the gas phase at room temperature, the kinetic energy of the CO2 molecules is sufficient to overcome the attractive forces between the molecules, allowing them to move freely and remain in the gaseous state. On the other hand, silicon dioxide (SiO2) has a three-dimensional network structure in which each silicon atom is bonded to four oxygen atoms, and each oxygen atom is bonded to two silicon atoms. These strong covalent bonds form a crystalline structure called quartz or silica. The arrangement of the silicon and oxygen atoms in SiO2 creates a rigid and highly stable network that requires a significant amount of energy to disrupt. At room temperature, the thermal energy is not sufficient to break the strong covalent bonds in SiO2, causing it to remain in a solid state. SiO2 has a high melting point (around 1,710 degrees Celsius or 3,110 degrees Fahrenheit) due to its strong intermolecular forces, which require substantial energy input to overcome. In summary, the difference in physical states between CO2 (gas) and SiO2 (solid) at room temperature arises from the molecular structures and the strength of the chemical bonds. CO2 has a linear structure with relatively weaker covalent bonds, allowing it to exist as a gas. In contrast, SiO2 forms a three-dimensional network structure with strong covalent bonds, resulting in a solid state at room temperature.
Does CO2 make a molecular solid?
Not at room temperature. But it is a molecular solid at temperatures below -78 degrees Celsius.
WILL liquid co2 boil at room temperature?
CO2 will not be a liquid at room temperature, rather a gas. It is only a liquid when compressed. Actually IF contained at high pressure it will be a liquid at room temperature ...It requires a combination of both pressure and temperature. It is a liquid in CO2 fire extinguishers and when the pressure is released some of it boils, absorbing a large amount of heat energy, more of it is released from the nozzle as a solid which then sublimes to forma gas.
Why CO2 is a gas at room temperature and SiO2 is a solid?
CO2 forms individual molecules in which one carbon atom is covalently double bonded to two oxygen atoms. Because these molecules are relatively small and have no dipole moment CO2 is a gas. Because of its larger atomic radius, silicon cannot form double bonds with oxygen as easily as carbon can. As a result, in stead of forming molecules SiO2 forms a covalent network in which each silicon atom is single boned to four oxygen atoms and each oxygen atom is bonded to two silicon atoms. Because of this structure the atoms in SiO2 are fairly firmly locked in place.
Why is CS2 a liquid at room temperature whereas CO2 is a gas at room temperature?
CS2 has a higher molar mass than CO2
Temperature scale conversion a piece of dry ice solid CO2 has a temperature of -100c what is its temperature in kelvins and in degrees f?
A piece of dry ice, solid CO2, has a temperature of -100 oC. What is its temperature in degrees Fahrenheit]
What must the temperature be below for CO2 to be solid?
In order for co2 to become a solid, or 'dry ice' as it's called, its temperature must be below -109.3 degrees F.
What kind of mixture is dry ice?
Dry ice is solid carbon dioxide, CO2. It is a pure substance, a chemical compound. It sublimes at room temperature goinf from solid to gas without turning into a liquid.
Which has a higher boiling point CO2 or SiO2?
intermolecular force between the sio2 molecule is greater than that of the co2 molecule....the co2 molecule is in it gaseous state while that of the sio2 is crystalline making the intermolecular force stronger than that of the co2 molecule.
At what temperature does CO2 become a solid?
-78.5 °C (-109.3 °F).
Name and describe the phase change that occurs when dry ice is placed in an opened container at room temperature?
Dry ice (solid CO2) at room temperature changes from a solid to a gas without going through the liquid phase. This is called sublimation.
