Why Are Most Metals Shiny Gray? (But Not All)
80% of chemical elements are metals. Most metals are lustrous gray when polished, but there are some exceptions, such as gold and copper, or less-known silvery-blue osmium, pale gold cesium, etc. The short answer to why it is so — is that the color of an object depends on its reflectivity. Reflectivity says how well a given object absorbs…
