1. The purest metal
Germanium: Germanium purified by regional melting technology, with a purity of "13 nines" (99.99999999999%)
2. The most common metal
Aluminum: Its abundance accounts for about 8% of the Earth's crust, and aluminum compounds are found everywhere on Earth. Ordinary soil also contains a lot of aluminum oxide
3. The least amount of metal
Polonium: The total amount in the Earth's crust is extremely small.
4. The lightest metal
Lithium: equivalent to half the weight of water, it can float not only on the surface of water, but also in kerosene.
5. The most difficult to melt metal
Tungsten: Melting point is 3410 ℃, boiling point is 5700 ℃. When the electric light is on, the temperature of the filament reaches over 3000 ℃, and only tungsten can withstand such high temperatures. China is the world's largest tungsten storage country, mainly consisting of scheelite and scheelite.
6. The metal with the lowest melting point
Mercury: Its freezing point is -38.7 ℃.
7. The metal with the highest yield
Iron: Iron is the metal with the highest annual production, with global crude steel production reaching 1.6912 billion tons in 2017. Meanwhile, iron is also the second most abundant metallic element in the Earth's crust
8. The metal that can absorb gases the most
Palladium: At room temperature, one volume of palladium metal can absorb 900-2800 volumes of hydrogen gas.
9. The best exhibiting metal
Gold: 1 gram of gold can be pulled into a 4000 meter long filament; If hammered into gold foil, the thickness can reach 5 × 10-4 millimeters.