It all depends on the configuration of electrons in the atom’s shells and subshells, this directly corresponds to conductors, semi-conductors, and insulators.
Why do certain materials conduct electricity better than others?
The resistance is normally constant for each material, but there is a different resistance for different materials. As the resistance of a material increases, its conductivity goes down, so the amount of current that it conducts must also decrease, according to Ohm’s law: I = V/R.
Why are some things better conductors of electricity?
“Silver is the best conductor of electricity because it contains a higher number of movable atoms (free electrons). For a material to be a good conductor, the electricity passed through it must be able to move the electrons; the more free electrons in a metal, the greater its conductivity.
Why do some substances conduct electricity while others don t?
Ions are atoms or small groups of atoms that have an electrical charge. Some ions have a negative charge and some have a positive charge. Pure water contains very few ions, so it does not conduct electricity very well. … Some substances that are made of molecules form solutions that do conduct electricity.
Why do some metals conduct electricity?
Metals conduct electricity by allowing free electrons to move between the atoms. These electrons are not associated with a single atom or covalent bond. … Alloys, which are a combination of different metallic elements, tend to offer a lower level of thermal conductivity than pure metals.
Which is the better conductor of electricity?
The best conductor of electricity is pure silver, but to no surprise, it is not one of the most commonly used metals to conduct electricity. The wide use of pure silver has a couple of drawbacks.
Why are silvers good conductors of electricity?
A conductor is a material which gives very little resistance to the flow of an electric current or thermal energy. … Silver is the best conductor because its electrons are freer to move than those of the other elements, thereby making it more suitable for the conduction of electricity and heat than any other element.
Do metals conduct electricity equally well?
While all metals can conduct electricity, certain metals are more commonly used due to being highly conductive. … Brass however – which contains copper – is far less conductive because it is made up of additional materials that lower its conductivity, making it unsuitable for electrical purposes.
Why do you think some objects conduct heat and electricity?
Metals contain free moving delocalized electrons. When electric voltage is applied, an electric field within the metal triggers the movement of the electrons, making them shift from one end to another end of the conductor. Electrons will move toward the positive side. Metal is a good conduction of heat.
Why are some metals stronger than others?
In an alloy, there are atoms of different sizes. The smaller or bigger atoms distort the layers of atoms in the pure metal. This means that a greater force is required for the layers to slide over each other. The alloy is harder and stronger than the pure metal.
Why do conductors conduct electricity and insulators don t?
Conductors conduct electricity because they have free electrons. But in the case of Insultors they don’t have any free electrons so they don’t conduct electric current. because conductors have more numbers of free electrons and insulators dont have …
Why are metals good conductors of both heat and electricity?
Metals are good conductors (both of heat and electricity) because at least one electron per atom is free: i.e., it is not tied to any particular atom, but is, instead, able to move freely throughout the metal.