an English radiochemist who explained, with Ernest Rutherford, that radioactivity is due to the transmutation of elements, now known to involve nuclear reactions.

one of the foremost Spanish dramatists of the 20th century.

a Swedish physicist and one of the founders of the science of spectroscopy.

an English scientist, inventor, and photography pioneer who invented the salted paper and calotype processes, precursors to photographic processes of the later 19th and 20th centuries.

a British chemist who worked concerning the periodicity of elements.

a Polish Romantic poet. He is considered one of the "Three Bards" of Polish literature — a major figure in the Polish Romantic period, and the father of modern Polish drama.