The addition of any ionic salt (even small quantities)
These are ionic compounds dissociated in water.
because a river is considered as a freshwater substance it has no salt in it and its fresh.
Add More Salt to make it more concentrated and add more wtaer to make it less concentrated
Yes, the higher the conductivity concentration the higher the conductivity value in the material. Some times the conductive particles are surrounded with insulating materials which cut the conductive paths between the electrodes and as a result it stops the increase in the conductivity values to a certain limit according to the structure (texture) in the material.
In an electrical system, essentially any conductive substance could be used to form a switch. At the integrated circuit level, it would be a partial conductor.
an electrolyte is any substance containing free ions that behaves as an electrically conductive medium.
Most drinking straws are made of plastic, which is generally not electrically conductive. However, paper straws may contain additives or coatings that could potentially make them conductive. It is always a good idea to exercise caution when using any materials near electrical sources.
Wearing less conductive clothing and non-conductive environment is the only way.
If you make it according to the directions on the package, it is.
Air, or some other gas, if you really want to get specific. Pure water is the least conductive substance. It is actually used as an electrical insulator by technology labs. The reason it is not widely used is that it is very expensive to produce. It is only the impurities in water that allows electricity to be conducted through it.
Pickles are conductive because of their acid content. The salt helps too. Pickles can even make a battery.
The main property of a substance that make it either conduct or insulate is electro-negativity. Electro-negativity is a substances "willingness," so to speak, to give up electrons. Most transition metals have high electro-negativity, and thus conduct well. Another thing about all metals that make them conductive is the way their atoms interact. Metallic atoms engage in metallic bonding which is where a group of metal atoms lump together and form sort of a giant atom with the nuclei (separated) in the middle, and all the electrons speeding about on the outside.