7 Scientists Flashcards
JJ Thompson
Plum Pudding model
Discovered the Electron
& charge/mass ratio
Robert Milikan
Charged oil droplets found that the charges were multiples of 1 small #
-1.6x10^-19 Coulombs
The charge of an electron
Wilhelm Rontgen
Found rays that could not be deflected by a magnet, he named X-Rays
Antoine Becquerel
Found rays from Uranium that were energetic and not deflected by magnets.
Marie Curie
Coined the term Radioactive claiming these rays spontaneously emitted particles and/or radiation
Ernest Rutherford
Sought Alpha Particles @ gold foil and found deflections claiming “most of the atom is empty space”. Positive Particles called Protons in the nucleus (center of atom) were responsible for the deflections
James Chadwick
Bombarded Barilleum with Alpha Particles and found that high energy Neutral Particles called Neutrons were emitted
Discovered the Electron & Charge/Mass Ratio
JJ Thompson
The charge of an electron -1.6x10^-19 coulombs
Robert Milikan
Found rays that could not be defelected by a magnet called XRays
Wilhelm Rontgen
Found rays from Uranium were energetic and not deflected by magnets
Antoine Becquerel
Coined the term Radioactive claiming that these rays spontaneously emitted particles and/or radiation
Marie Curie
Protons—- Used thin gold foil as targets for alpha particles from a radioactive source and found deflections claiming that most of the atom is empty space. The positive particles called protons inside the nucleus (center of the atom) were responsible for the deflections
Ernest Rutherford
Discovered neutrons - bombarded barilleum with Alpha Particles and found that high energy neutral particles called neutrons were emitted
James Chadwick
Who was Avagadro?
The Mole
6.02 x 10^23
