Aluminum is one of the metal elements with the widest distribution and most reserves in the earth's crust, accounting for about 8.3% of the total mass of the earth's crust, second only to oxygen and silicon, and higher than iron (about 4.75%), magnesium (about 2.1%) and titanium (Approximately 0.6%) the sum is still more. Its chemical element symbol is Al, the relative atomic mass is 26.98154, and the common valence is +3.
