Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
17 Cards in this Set
- Front
- Back
|
Coined the term "atom" meaning "indivisible"
Model was a sphere/ball-like |
Democritus
|
|
|
part of the generation that succeeded Democritus and did not believe in atoms
|
Aristotle
|
|
|
Revived the atomic theory and stated....
Atoms of different elements are different Atoms of the same element is exactly alike. Thought atoms were "indivisible" |
John Dalton
|
|
|
Gold Foil Experiment
Nuclear Model of the atom. Located the nucleus most of the atom is empty space |
Ernst Rutherford
|
|
|
Determined the atomic numbers of atoms
Organized the periodic table by ATOMIC NUMBER |
Henry Moseley
|
|
|
Discovered matter changes form but the mass stays the same. Discovered and named Hydrogen and oxygen.
|
Antoine Lavoisier
|
|
|
planatary model of the atom
|
Niels Bohr
|
|
|
Law of Definite Proportions
|
Joseph Proust
|
|
|
discovered the neutron
|
James Chadwick
|
|
|
discovered radioactivity
|
Henri Bacquerel
|
|
|
hypothesis stateing equal volumes of gases have equal number of particles (6.02^23)
|
Amedeo Avogadro
|
|
|
developed the x-ray
|
Wilhelm Roetgen
|
|
|
"oil drop" experiment lead to discovery of the charge of the electron
|
Robert Millikan
|
|
|
discovered radioactive elements radium and polonium
|
Marie Curie
|
|
|
Used the cathod ray tube and discovered the ratio of the particle's charge to the mass was always the same regardless of the metal. They were called electrons.
|
Sir Joseph Jon Thomson
|
|
|
recognized the existance of isotopes
|
Frederick Soddy
|
|
|
explained the photoelectric effect
|
Albert Einstein
|
