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|[[Brine|Salty water]] is an '''electrical conductor'''.
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==Key Stage 3==
===Meaning===
An '''electrical conductor''' is a [[material]] with a very low [[Electrical Resistance|Resistance]] to the flow of [[electricity]].
===About Electrical Conductors===
: [[Metal]] [[element]]s are good '''electrical conductors'''.
: [[Metal]]s make good '''conductors''' because they have [[Delocalised Electrons|free electrons]] that can move around the [[metal]].
: [[Non-metal]] [[element]]s are usually poor '''electrical conductors'''. [[Carbon]] in the form of [[graphite]] is an exception to this.
: [[Salt]]s that are [[molten]] or [[dissolve]]d in [[water]] are '''electrical conductors'''.
: [[Salt]]s make good '''conductors''' when the [[ion]]s are free to move through the [[substance]].
: To determine if an [[object]] is a good '''electrical conductor''' the [[object]] can be added to a [[circuit]]. If a [[Electrical Current|current]] flows then it is a good '''conductor'''.
: To compare the '''[[Electrical Conductivity|conductivity]]''' of different [[object]]s an [[ammeter]] can be added to the [[circuit]]. The higher the [[Electrical Current|current]] the better the [[object]] is at [[conducting]].