Chapter 4 Flashcards
Discovered the Nucleus
Rutherford
The law of conservation of mass
Antoine Lavoisier
Plum pudding model
JJ Thompson
Positively charged atom
Cation
Developed the Atomic Theory
John Dalton
Planetary model
Neils Bohr
Found the electron using cathode rays
JJ Thompson
Wrote the law of definite proportions
Joseph Proust
Empty space + nucleus model
Rutherford
Used the word atomos
Democritus
Discovered neutrons
Chadwick
Believed that there are only 4 elements
Aristotle E
The rays and particles that are emitted by a radioactive material
Radiation
A reaction that involved a change in an atoms nucleus
Radioactive decay
The process in which an unstable nucleus loses energy spontaneously
Nuclear reaction
Fast moving electrons
Beta radiation
What’s the smallest proton, neutrons, or electron
Electron
