Contributors to the Atomic Theory

Contributors to the Atomic Theory

• Democritus-1st attempt to understand the atomic theory.
• Greek Philosopher
• people didn't accept him

Contributors to the Atomic Theory

• Dalton- Father of Chemestry.
• Proved atoms exsisted
• Developed the atomic theory
• Reinforced what Democritus thought

Contributors to the Atomic Theory

• Thomson- England Scientist
• Discovered Electrons
• Atom model called "plum pudding" or today Chocolate Chip Cookie Pie

Contributors to the Atomic Theory

• Rutherford-Discovered protons & nucleus
• Experiment:positive particles shot toward a sheet of gold found most of atom to be empty space
• >>>He was a Teacher<<<

Contributors to the Atomic Theory

• Chadwick-student of Rutherford
• discovered neutrons
• neutrons have no charge

Contributors to the Atomic Theory

• Bohr- 1900's Denmark
• discovered electrons are located in energy levels
• compared electrons like planets in orbit
• won Nobel Prize

Contributors to the Atomic Theory

• Today-we know electrons are NOT in specific paths but their location is predicted based on the amount of energy they possess (they are in a cloud)
• there are quarts, 6 types- up, down, top, bottom, strange, and charm