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you fail at chem/physics.
contact?? i think you mean conduct, because every substance can contact electricity.
A: some conduct electricity better (eg. metals) because they have free moving electrons in their outer shell. electricity is the movement of electrons. therefore metals readily allow a current of electrons to pass though them.
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∙ 14y ago
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What are semiconducters?
semiconducters are substances that can conduct electricity under some conditions but not under other conditions
Do substances which dissolve in water conduct an electric current?
Some do. Electrolytes, which are substances that break into ions when dissolved in water, will conduct electricity. Such substances include soluble salts, acids, and bases.Other water soluble substances are non electrolytes and do not break into ions in water, or at least do so in extremely minute amounts. They do not conduct electricity. These include alcohols, sugars, and some other polar compounds.
What substances do not conducted electricity?
Insulators.
What two conditions do substances need to conduct electricity?
All it needs is some kind of metal in the substance.
Is static electricity a contact or non-contact force?
Static electricity is a non-contact force :)
Do simple molecular substances conduct electricity?
Most molecular substances do not conduct electricity since the ions don't dissociate very well with molecular substances. However, most ionic substances do conduct electricity very well due to their ability to dissociate very well in water.
What group are good conductors of electricity?
metals and such substances are good condutors of electricity.
What is the substances that have high resistance to electricity?
rrefedsf
What hinders electricity pass?
Opaque substances.
What are the classification of materials according to electrical conductivity?
Most substances fall into two categories - conductors and insulators. Conductors are those which electricity can pass through relatively easily. Metals are the usual example, but other substances such as graphite and polar liquids such as water are also good conductors. Insulators are poor conductors: those that electricity cannot pass through easily. Most plastics are insulators. Some substances fall in between: these are semiconductors, which allow electricity through in some instances, but not in others. This property makes them very useful in electronics. Some substances can be such good conductors that, under some circumstances, they can allow electricity to pass through them with no resistance at all. These are called superconductors.
How were electrical conductors discovered?
in 1729, Stephen Gray, an English physicist, found that some substances could carry electricity from one location to another. These substances were called conductors.
Do covalent compounds conduct electricity?
No. Covalent substances do not conduct electricity in solid or liquid state.
