Daily Archives: April 2, 2018

William Crookes — April 4 marks the passing of William Crookes. Crookes was an English chemist best known for the discovery of the element thallium. Crookes was sent a ten-pound (2.2 kg) sample of sludge from his former teacher August von Hofmann. Crookes had moved his research from organic chemistry to compounds of […]

Today in Science History – April 4 – William Crookes

This entry was posted on April 2, 2018 by Todd Helmenstine (updated on September 15, 2021)

Richard Abegg — April 3 marks the passing of Richard Abegg. Abegg was a German chemist who was one of the early researchers of valence theory. His experiments showed a tendency between the maximum and minimum valence levels of elements differed usually by a value of eight. This relationship became known as Abegg’s […]

Today in Science History – April 3 – Richard Abegg

This entry was posted on April 2, 2018 by Todd Helmenstine (updated on April 3, 2022)