Which of the following is the hardest metal?
Iron is the hardest metal. Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal in the first transition series and it is the most common element in the whole planet Earth.
Iron is the hardest metal. Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal in the first transition series and it is the most common element in the whole planet Earth.
