What is the chemical symbol for iron?

The chemical symbol for iron is derived from its Latin name "ferrum," which is represented by the letters "Fe." This notation is used universally in the field of chemistry to identify the element iron on the periodic table, which highlights its unique properties and role in various chemical reactions and biological processes.

The other symbols presented in the question correspond to different elements: "Si" represents silicon, "Cu" represents copper, and "Al" stands for aluminum. Each of these elements has its own specific characteristics and applications, but they are distinct from iron both in terms of chemical properties and elemental identity. Iron, being a transition metal, plays a critical role in various applications including construction, manufacturing, and as an essential trace element in biology.