Scientists
Greek philosopher who said atoms are indivisible solids
Who is Democritus?
Dalton performed these to support his idea that atoms can't change into other elements or be divided
What are chemical reactions?
Model proposed by John Dalton
Solid Sphere Model
Negatively charged particle. Mass is much smaller than the atom
Aristotle thought these 4 elements make up all matter
Experimenter who revived atomic theory with the solid sphere model
Who is John Dalton?
Thomson used this apparatus to discover the electron
What is the cathode ray tube?
Model proposed by Ernst Rutherford
Particles with a +1 charge
Democritus couldn't do these to prove his ideas but Dalton could
What are experiments?
Scientist who discovered electrons using cathode rays
Who is J. J. Thomson?
Rutherford performed this experiment and discovered the nucleus
What is the gold foil experiment?
Model proposed by many modern scientists
Neutral particle discovered by James Chadwick
What are neutrons?
Scientist that discovered neutrally charged particles
Who is James Chadwick?
Shot alpha particles at gold foil and discovered the nucleus
Who is Ernest Rutherford?
Heating elements produces specific colors of light. Showed that electrons jump between energy levels.
What is the atomic emission spectrum experiment?
OR
What is the flame test experiment?
Model proposed by J. J. Thomson
What is the plum pudding model?
Smaller particles that make up protons and neutrons. There are 6 flavors
What are quarks?
What is the atomic model?
Used flame tests to explain electron energy levels and proposed the planetary model
Who is Niels Bohr?
The apparatus that allowed scientists to see atoms for the first time
What is the scanning tunneling microscope?
Model proposed by Niels Bohr
What is the planetary model?
We can't see these without advanced technology, 7.5 trillion of these can fit into one period
What are atoms?
The six flavors of quarks
What is top, bottom, up, down, charm, and strange?