InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
Describe one physical change needed to obtain metal form rock |
|
Answer» Unreactivemetals such as gold are found in the Earth's crust as the uncombined elements. However, most metals are found combined with other elements to form compounds.An ORE is a rock that contains enough of a metal or a metal COMPOUND to make EXTRACTING the metal worthwhile:low-grade ores contain a small percentage of the metal or its compoundhigh-grade ores contain a larger percentageMost metals are extracted from ores found in the Earth's crust. It is more expensive and wasteful to extract a metal from a low-grade ore, but most high-grade ores have ALREADY been USED. |
|