Scientists of Atomic Theory Flashcards
1
Q
John Dalton
A
Is best known for proposing modern atomic theory.
2
Q
J.J. Thompson
A
Used a cathode ray tube to discover the electron and calculate its charge-to-mass ratio.
3
Q
Robert A. Millikan
A
Discovered the mass of an electron.
4
Q
Ernest Rutherford
A
Discovered the proton.
5
Q
Frederick Soddy
A
Discovery of isotopes.
6
Q
James Chadwick
A
Discovery of neutrons.
7
Q
Antoine Lavoisier
A
The same amount of matter exists before and after the change.
8
Q
Joseph Proust
A
Discovered that all samples of a chemical compound always contain the same elements in the same ratio by mass.
9
Q
John Dalton
A
Formulated assumptions about the nature of atoms and matter.
10
Q
Democritus
A
One of the first to propose the theory that matter is made of tiny, indivisible particles.
