Non-metals are elctron donors; metals are electron receivers. Non metals predominantly produce covalent bonds when bonding with other non-metals, metals produce ionic bonds when bonding with non-metals. Metals don't bond with each other, but form all...
as others have said diamond is the hardest natural material and diamond nanorods are the hardest period but if you are looking for a metal it gets more complicated. Modern high speed steels can get above a rockwell C (if you are going to try to corre...
Titanium Metals makes a large majority of the worlds titanium which is a strong metal alloy. While the plant may not be the most pleasant thing to look at, it is safe. I actually find it oddly interesting myself and cant help but to stare at it when ...