Question

Is Aluminium a metal or a metalloid?

Answer 1

Metal And Metalloid:

1. Metals and metalloids are both found in the periodic table, although their characteristics differ.
2. Metals are distinguished by their lustrous appearance, high density, higher melting points, electrical conductivity, malleability, and ductility whereas metalloids show properties of both metals and non-metals.
3. The six most common metalloids are boron, germanium, silicon, antimony, arsenic, and tellurium.
4. Metalloid lacks malleability and ductility. As non-metals are, it's a brittle substance.
5. Metalloids have an electrical conductivity that ranges from moderate to high. Electronic band structures of metalloids are known to be similar to semimetals or semiconductors.
6. Aluminum has an atomic number$=13$ and is a good heat and electrical conductor. In nature, it is hard, ductile, malleable, and lustrous with a high melting and boiling point. Hence it is considered as a metal.

Therefore, Aluminium is a metal.