Because sodium is not as stable as copper.
yes
the heat can travel up the copper rail... copper is a very good conductor of heat...
Between iron, copper, and aluminum, copper is the best, followed by aluminum, and last by iron. Gold is often plated over other metals because it is even better and resists corrosion.
d
No it is a conductor. Aluminium wire is used in 400 amp services to keep the cost down over copper wire.
Copper is a better conductor of electricity than gold. This is because copper has more free electrons available for conducting electricity due to its electron configuration. Gold has fewer free electrons, making it less conductive than copper.
The question isn't very specific (preferred for what?!), but sodium metal is less reactive than potassium. It is also slightly more abundant than potassium on Earth.
Platinum is preferred over copper for flame tests due to its high melting point and chemical inertness, which ensures it does not contaminate the sample being tested. Copper, on the other hand, may react with some chemicals at high temperatures, leading to inaccurate test results. Platinum's stability and reliability make it the preferred choice despite its higher cost.
Copper is an excellent conductor, ductile (can be drawn easily), and reasonably economical. For bare conductors, copper oxidises and the oxide coating prevents further corrosion. While it is heavier than aluminum, it is stronger. The alternative, aluminium, is cheaper than copper, but not as good a conductor. Aluminium is lighter, but weaker, and aluminium transmission lines require a steel-core for strength. Aluminium conductors suffer from 'cold flow', which means that aluminium conductors secured with screw terminals tend to work loose over time. Copper doesn't do this, so copper is preferred for residential/commercial electrical wiring systems.
COPPER IS NOT THE FASTEST CONDUCTOR OF HEAT. IT IS SILVER. But Copper is widely used because it is cheaper and more readily available than Silver. Copper is a fast conductor of heat because of the arrangements of this atoms and molecules as heat is caused due to vibration of molecules and eventual collisions.
Copper is an excellent conductor of electricity, and so can safely conduct away the charge of a lighning bolt without heating up and creating a fire hazard. The only better conductor is silver, which is too expensive for such a use.
It would of course depend on the specific application. Current tends to travel on the surface of a conductor and a stranded conductor has more surface area and thus offers less resistance to the current. Stranded wire also bends a bit easier than the corresponding size solid wire.