4 POINTS

William Crookes:(1832-1919)
– British Chemist and Physicists
– Discovery of the element thallium – 1861 discovered weight of element
– Invented the radiometer
– Discovered principles of Crooks radiometer-converts light radiation into rotary motion

5 POINTS

Henri Becquerel: (1852-1903)
– Discovered radioactivity
– Created experiment to show naturally occurring force (x rays)
– Won Noble Prize for Physics in 1903

3 POINTS

Henri Becquerel: (1852-1903)
– Discovered radioactivity
– Created experiment to show naturally occurring force (x rays)
– Won Noble Prize for Physics in 1903

4 POINTS

William Crookes:(1832-1919)
– British Chemist and Physicists
– Discovery of the element thallium – 1861 discovered weight of element
– Invented the radiometer
– Discovered principles of Crooks radiometer-converts light radiation into rotary motion

4 POINTS

Ernest Rutherford (1871-1937)
– New Zealand-born British physicist
– father of nuclear physics; discovered radioactive half-life
– discovered proton; 1908 Nobel Prize in Chemistry
– rutherfordium (element 140) was named after him in 1997.

2 POINTS

J. J. Thomson (1856-1940)
– an English physicist
– credited with the discovery and identification of electrons and the discovery of the first subatomic particle
– won the 1906 Nobel Prize in Physics.