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Sir William Crookes and His Contribution to Atomic Theory BY BRODY DONALDSON.

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Presentation on theme: "Sir William Crookes and His Contribution to Atomic Theory BY BRODY DONALDSON."— Presentation transcript:

1 Sir William Crookes and His Contribution to Atomic Theory BY BRODY DONALDSON

2 Date of Birth  June 17 th, 1832  The Institution of Engineering and Technology. "Sir William Crookes." N.p., n.d. Web. 1 Dec

3 The Chemical News is Founded  Sir William Crookes first published this magazine in the year 1859, he continued to publish it until  In this magazine he would later publish his new findings.  The Institution of Engineering and Technology. "Sir William Crookes." N.p., n.d. Web. 1 Dec

4 Discovery of Thallium  In 1861 Crookes discovered this new element through spectroscopic methods.  Thallium was discovered accidentally while Crookes was looking for something else.  National High Magnetic Field Laboratory. "William Crookes." N.p., n.d. Web. 1 Dec

5 Atomic Weight of Thallium  In 1873 Crookes made his final determination on the atomic weight of his newly discovered element.  Encyclopædia Britannica. "Sir William Crookes." N.p., n.d. Web. 2 Dec

6 Characteristics of Cathode Rays  Crookes discovered new characteristics of cathode rays in the year He found that… 1. They travel in straight lines. 2. They cause glass to fluoresce. 3. They impart a negative charge to the objects they strike. 4. Electric and magnetic fields deflect them, suggesting a negative charge.  Buescher, Lee. "Atomic Structure Timeline." N.p., n.d. Web. 2 Dec

7 Crookes Dark Space  Crookes also observed the dark space around cathode rays.  Encyclopædia Britannica. "Crookes Dark Space." N.p., n.d. Web. 2 Dec

8 A Spinthariscope is Developed  In 1903 Crookes developed this device, used for the study of alpha particles.  The spinthariscope allowed for the viewer to see matter decay.  Oak Ridge Associated Universities. "Crookes Spinthariscope." N.p., n.d. Web. 2 Dec

9 Date of Death  April 4 th, 1919  The Institution of Engineering and Technology. "Sir William Crookes." N.p., n.d. Web. 1 Dec


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