4. Most non-metals are conductors of
heat.
5. Why can sodium be cut with knife?
6. Why gold and silver is used for jewelry?
7. What happen when iron nails are kept in copper sulphate solution?
please answer
Answers
Answer:
most non metals ate bad conductors of heat
Sodium is silver white color metal with malleable and ductile property. It is the metal that can easily be cut with a knife. It is a good conductor of heat and electricity.
Gold and silver is used in jewellery because their oxidation is very low
CuSo4 is turn to FeSo4
Explanation:
4. Non-metals are electron gainers,i.e. they tend to gain electrons in their valence shell electrons….while metals are electron givers or looser for a similar reason.
So metals have contain free electrons in their outermost shell while non-metals don't and these electrons are ones which cause the electric current by their coordinated movement.
Thats why, most non-metals are poor conductors of electricity(i.e. due to a deficiency of free electrons).
Graphite(carbon) is an exception in this case but thats a different topic and more related to chemistry than physics
5. As sodium metal is soft in nature so it can be easily cut with knife
6.As gold and silver are the most lustrous and shiny in nature so they are used for jewellery as the give a shining effect.
7.When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green.