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Carbon and silicon belong to Group $4 \mathrm{A}$ of the periodic table and have the same valence electron configuration $\left(n s^{2} n p^{2}\right) .$ Why does silicon dioxide $\left(\mathrm{SiO}_{2}\right)$ have a much higher melting point than carbon dioxide $\left(\mathrm{CO}_{2}\right) ?$
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Chemistry 102
Chapter 11
Intermolecular Forces and Liquids and Solids
Liquids
Solids
University of Central Florida
University of Kentucky
Lectures
04:08
In physics, a solid is a state of matter characterized by rigidity and resistance to changes of shape or volume. Solid objects have a definite volume, they resist forces (such as pressure, tension and shear) in all directions, and they have a shape that does not change smoothly with time. The branch of physics that studies solids is called solid-state physics. The physical properties of solids are highly related to their chemical composition and structure. For example, the melting point of ice is significantly lowered if its crystal structure is disrupted.
03:07
A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. As such, a liquid is one of the four fundamental states of matter (the others being solid, gas and plasma). A liquid is made up of tiny vibrating particles of matter, such as atoms, held together by intermolecular bonds. Water is, by far, the most common liquid on Earth. Like a gas, a liquid is able to flow and take the shape of a container. Most liquids resist compression, although others can be compressed. Unlike a gas, a liquid does not disperse to fill every space of a container, and maintains a fairly constant density. A distinctive property of the liquid state is surface tension, leading to wetting phenomena.
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SiliconDescribe the st…
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why does SiO2 have a highe…
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Why does silicon form only…
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Why does silicon form onl…
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Carbon forms the $\mathrm{…
00:54
Silicon lies just below ca…
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Explain why, even though $…
01:54
Explain why Group $4 \math…
01:37
03:05
(a) Determine the electron…
to answer this question. We're going to consider how carbon dioxide and how silicon dioxide exist. So right off the bat, we say, Well, go to is discreet molecules. These exists just on their own floating around. But there is one key difference with silicon dioxide, and that is that it has the ability to form CO Vaillant bonds and the instant that we realize that Covalin bonds are possible to exist in its crystal form. We know that crystals are gonna have much higher melting points, silicon dioxide being a common component of glass. So we know from our daily life existence. The glass does not exist in gaseous form of carbon dioxide dust, and that's because it's again discreet known crystalline. But the instant we add in that CO Vaillant networking, they're gonna that silicon dioxide is going to be very stable in the network. It's gonna be able to form versus carbon dioxide, which is floating around on its own, and thus it's not gonna take nearly as much energy as the silicon docks
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