metals and nonmetals using electricty

Earth is an abundant source of material. Man has intensively studied the properties of these materials extensively and found new methods of using them. The air we breathe, the water we drink, stones and rocks, almost everything that is around us, are all useful to man for ..

The progress of the civilization was first benchmarked by man's increasing knowledge and usage of metallic deposits in the earth's crust. Early man used stones, bones and wood to fulfill their requirements of hunting, cooking and buildin..

. Bronze was widely used for many years and this epoch of prehistory became Bronze Age. They indicate a gradual change in the life style of mankind. About 7000 years ago it was discovered that certain minerals would yield metals when placed in the fire. Many of these colored min..

Elements can be further divided into metals and non-metals..

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