Hafnon is a rare chemical element with the atomic number 72 and symbol Hf. It belongs to the group of transition metals and has various synonyms that are used interchangeably. The most common synonym is Hafnium, which is derived from the Latin word 'Hafnia,' meaning Copenhagen, where it was first discovered. Other synonyms include unnilseptium, dvi-zirconium, and unnilhexium based on its position in the periodic table. In industry, it is commonly referred to as Hf because of its widespread use in the nuclear industry as a neutron absorber. Hafnon is also a vital component of modern electronics and is used in the production of integrated circuits, superalloys, and nuclear reactors.