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Why does a semiconductor have fewer electrons than a conductor?
Valence electrons only are able to cross the energy gap in semiconductors since it is greater than that of conductors. That is why semiconductors have fewer free electrons than conductors.
Does wood keep the cold out as an insulator?
Solids are generally better (more efficient) heat conductors than liquids, which are better heat conductors than gases. Metals are the most efficient heat conductors because they contain so many free charge carriers (electrons), which carry heat efficiently -- it is difficult to keep an iron rod cold at one end and hot at the other. Plastic is probably the worst heat conductor (good heat insulator) among solids, because plastic material has few charge carriers. A piece of solid wood would be a marginal insulator from cold -- it has a finite amount of charge carriers from the moisture in the wood. With that said, the more porous the wood, the better heat insulator it is, because it has more air bubbles/pockets to do the insulation. A better construction of a cold barrier will be using two or more sheets of solid wood with a gap in between two adjacent sheets. Cork which is a wood product and used to be extensively used as an insulator, nowadays displaced by better materials.
True Or False Materials that are poor conductors are poor insulators?
No. Something that is a poor conductor must be a good insulator and vice versa. If a material conducts better than it insulates it is considered a good conductor, if it insulates better than conducts it is considered a good insulator. No material can be both a poor conductor AND a poor insulator. It is impossible.
Is glass a better conductor of heat than plastic?
Glass and plastics are not good conductors of electricity.
The difference of insulator to conductors in atomic structure?
Ptresumably electricity, rather than heat? There is no absolute dividing line or absolute rule about the two but conductors are able to transfer charge easily through their mass. This usually means loosely held outer electrons, but semi-conductors (which can be good conductors) do not follow this rule and neither does water (a reasonable conductor). Water conducts by quickly making and breaking bonds between adjacent molecules so that the overall effect is transfer of ions across the water.
Do conductors generally have more electrons than protons?
It would be more correct to say that conductors have more free charge carriers (electrons or "holes") than insulators. For example, in the metallic model, positive nuclei in a fixed position are surrounded by a sea of electrons not necessarily tied to any particular nucleus, and thus free to flow when electromotive force is applied. In an insulator, those same electrons are more resistant to electromotive force and tend to remain in the same position until a much higher ("breakdown voltage") force is applied. The number of electrons themselves is less relevant, any given conductor may have more or less electrons than an insulator.
Do Conductors conduct heat more slowly than insulators?
No, a conductor (of heat) will conduct heat more efficiently than an insulator.
Why is current established more easily in a semiconductor than in an insulator?
Semi conductors will pass electricity through with some restriction. Insulator will not pass electricity
Why does a semiconductor have fewer electrons than a conductor?
Valence electrons only are able to cross the energy gap in semiconductors since it is greater than that of conductors. That is why semiconductors have fewer free electrons than conductors.
Why are metals better conductors than ceramics?
Metals are better conductors than ceramics because they have a large number of loose electrons. Electricity has loose electrons.
What material conductors electric current better than an insulator but not as well a conductor?
semiconductor
Explain why metals are good conductors?
Metals have between 1 and 3 valence electrons, and they therefore find it easier to give up electrons, to form a complete outer shell, than to acquire more electrons, since they would need between 7 and 5 additional electrons to form a complete outer shell of 8. When you have a collection of atoms which all are predisposed to give up electrons, the result is called a metallic bond, which consists of a cloud of shared electrons. Because these electrons are not bound to any specific atom, they move easily and conduct electricity well.
How many valence electrons do conductors such as copper have?
good conductors have only one or two electrons in the outer shell while insulators have many more, around eight
Does wood keep the cold out as an insulator?
Solids are generally better (more efficient) heat conductors than liquids, which are better heat conductors than gases. Metals are the most efficient heat conductors because they contain so many free charge carriers (electrons), which carry heat efficiently -- it is difficult to keep an iron rod cold at one end and hot at the other. Plastic is probably the worst heat conductor (good heat insulator) among solids, because plastic material has few charge carriers. A piece of solid wood would be a marginal insulator from cold -- it has a finite amount of charge carriers from the moisture in the wood. With that said, the more porous the wood, the better heat insulator it is, because it has more air bubbles/pockets to do the insulation. A better construction of a cold barrier will be using two or more sheets of solid wood with a gap in between two adjacent sheets. Cork which is a wood product and used to be extensively used as an insulator, nowadays displaced by better materials.
What is the difference between the resistance of conductor and insulator?
Conductors allow most, if not all, electricity to pass through it. This is due to "wandering electrons" that aren't tightly bound to the nucleus of the conductor itself.Resistors conduct some, but not all electricity to pass. It somewhat resists it, hence resistors.Insulators do not allow electricity to pass through it due to the electrons being so tightly bound to the nucleus.
Why does a semiconductor have fewer free electron than a conductor?
Valence electrons only are able to cross the energy gap in semiconductors since it is greater than that of conductors. That is why semiconductors have fewer free electrons than conductors.
Is calcium a good conductor of electricity and heat?
Yes, calcium is a good conductor of heat and electricity. Most metals are good conductors of heat and electricity. Most nonmetals are not good conductors of heat and electricity.
