Interesting facts about metals

The most abundant metal in the earth's crust is aluminum. In the bowels of the earth it contains eight percent, while gold - only 5 millionths of a percent. However, people did not know aluminum for a long time: its first ingot was smelted in France only in 1885, and this metal was then considered precious.

Tantalum, niobium, cesium, germanium, zirconium, lithium, strontium, rubidium, rhenium, indium are rare metals. But the "rarity" of these metals is conditional, since many of them are quite sufficient in nature. For example, titanium is in sixth place in terms of content in the earth's crust, and cesium is in seventh. However, due to the fact that all these metals are strongly associated with their accompanying elements, it is very difficult to extract them in their pure form. An interesting fact is that 80 percent of the world's uranium ore reserves are concentrated in the Congo.