People To Know

Question 1

Becquerel (1896)

Answer 1

Discovered radioactivity with experiments of fluorescence

Question 2

Marie curie (1898)

Answer 2

Discovers Th and Ra are radioactive

Question 3

Rutherford (1899)

Answer 3

Radioactivity consists of a alpha, beta or gamma particle

Question 4

Rutherford and Soddy (1900)

Answer 4

Created theory of decay. Found amount of radiation being emitted was dependant of the number of parent atoms present and expressed as the ratio of decay.

-dN/dt = lambdaN

Question 5

Rutherford and Boltwood (1905)

Answer 5

Collected first radio metric data from u-rich minerals

Question 6

Thompson (1913)

Answer 6

Different atoms of the same element can have different masses

Question 7

Holmes (1915)

Answer 7

Dates of earth 1.6Ga

Question 8

Soddy (1915)

Answer 8

Different atoms of the same element are called isotopes

Question 9

Urey (1931)

Answer 9

Predicts/confirms H isotope fractionation happens by evaporation