TOPIC 1-3 Scientists

Question 1

first described atom

Answer 1

Democritus and Leucippus

Question 2

the first to father scientific data about the existence of atom

Answer 2

Antoine Lavoisier

Question 3

proposed the first systematic atomic theory

Answer 3

John Dalton

Question 4

theorized that energy can be gained or lost only in multiples of quantity

Answer 4

Max Planck

Question 5

discovered electron

Answer 5

JJ Thompson

Question 6

discovered atom’s nucleus

Answer 6

Ernest Rutherford

Question 7

proposed the quantum model for hydrogen atom

Answer 7

Neils Bohr

Question 8

developed the concept of electron spin

Answer 8

Samuel Goudsmit and George Uhlenbeck

Question 9

developed a method to denote potential bonding electrons by using one dot for every valence electron

Answer 9

G.N. Lewis