Question

Name the following

A metal that was expensive, very hundred years back but is cheap today

Answer 1

1. The elements that have the tendency to lose electrons and thereby form positively charged element is metals.
2. The cost of every metal depends on its availability and the ease to obtain it.
3. Aluminium ($\mathit{A}\mathit{l}$) a few years ago was so difficult to obtain because the extraction process was expensive, making its cost expensive.
4. But now it is the cheapest metal since a better inexpensive extraction of Aluminum from its ore Bauxite($\mathit{A}{\mathit{l}}_{\mathbf{2}}{\mathit{O}}_{\mathbf{3}}$) ore is present.

So a metal that was expensive a very hundred years but was cheap today is aluminium.