History of Atomic Theory

WHO proposed that matter consisted of tiny particles that differed in size, shape, color, texture, etc?

Democritus

WHO proposed that matter consisted of tiny solid spheres?

Dalton

WHO proposed that atoms consisted of a sphere of positive charge with negatively charged particles embedded in it?

Thomson

WHO proposed that atoms consisted of a dense, positive core with electrons circling it in different energy levels?

Bohr

WHO proposed that atoms consisted of a dense, positive core with electrons orbiting around it?

Rutherford

WHO proposed that atoms consisted of a dense, positive core with electrons surrounding it in different energy levels and orbitals within those energy levels?

Schrodinger

What was the NAME of the MODEL wherein matter was made of tiny particles that differed in size, shape, color, texture, etc?

atomos

What was the NAME of the MODEL wherein matter was made of tiny solid spheres?

solid sphere model

What was the NAME of the MODEL wherein atoms were a sphere of positive charge with negatively charged particles embedded in it?

plum pudding model

What was the NAME of the MODEL wherein atoms were a dense, positive core with electrons circling it in different energy levels?

planetary model

What was the NAME of the MODEL wherein atoms were a dense, positive core with electrons orbiting around it?

nuclear model

What was the NAME of the MODEL wherein atoms were a dense, positive core with electrons surrounding it in different energy levels and orbitals within those energy levels? 

quantum mechanical model

What was the EXPERIMENT that showed all visible matter is comprised of smaller, invisible particles?

reactions between gas atoms

What was the EXPERIMENT that showed atoms can be broken down into even smaller particles that have negative charge?

cathode ray tube

What was the EXPERIMENT that showed the positive charge of atoms is concentrated in the very center of the atom and the rest of the volume is mostly empty space?

gold foil experiment

What was the EXPERIMENT that showed electrons can only be found in specific orbits around the nucleus, known as energy levels?

hydrogen emission spectrum

What was the EXPERIMENT that showed electrons can exist as particles or as waves of energy?

double slit experiment

What was the conclusion of the photoelectric effect experiment?

that light sometimes behaves as a particle

What was the conclusion of the double slit experiment?

that electrons sometimes behave like waves

What is the current understanding of light and matter?

there is wave-particle DUALITY of both matter and light