William Crookes

By: Alfredo Martinez

Background Information

William Crookes was born in London, England on June 17, 1832. William studied at the Royal College of Chemistry in London. After college, William worked as superintendent of the meteorological department at Radcliffe Observatory. He also worked at the College of Science in Chester, Chesire. He was then passed down money inherited from his father in 1855. This money allowed William the opportunity to devote his time solely to scientific work in his own private laboratory. During this time in his laboratory, William discovered a dark space around the cathode while working on electrical discharges through a rarefied gas. This discovery was later named the Crookes dark space. Another interesting fact is that he was knighted in 1897.
Big image

Contribution to Atom

In accordance with the periodic table, William Crookes had discovered the element Thallium in 1861 and conducted many tests revolving this new found element. He soon found the atomic weight of it in 1873 a couple years later. During William's studies of the cathode rays, he had discovered that the waves bent by a source of magnetic presence, which he came to the understanding that they were negatively charged particles. This discovery helped in the determination of an electron's charge. After William's discovery became more well known future scientists came to call his experiments parts "Crookes tubes." For conducting experiments, William used electric discharge lamps by creating radiation from striking electrodes in a vacuumed tube while also being fed minuscule amounts of elemental gas.
Big image
Crookes magnetic deflection tube