After which Danish city is the 72th element on the periodic table named?

The story behind the answer

Copenhagen is correct because element 72 is hafnium (Hf), named from Hafnia, the Latin name for Copenhagen. It was discovered in 1923 by Dirk Coster and George de Hevesy at the Niels Bohr Institute, using X‑ray spectroscopy on zirconium ores. Niels Bohr had predicted from electron structure that element 72 would be a transition metal resembling zirconium, not a rare earth—guiding the search.

Remember it this way: Hf = Hafnia = Copenhagen. Hafnium