name ______________ period ______________ history of atomic theory\nfill in the missing information in the…
name ______________ period ______________ history of atomic theory\nfill in the missing information in the chart below:\n| name of researcher | equipment/experiment | sketch of model | major idea/discovery |\n| ---- | ---- | ---- | ---- |\n| dalton | n/a | n/a | all atoms of a given element are identical in mass and properties |\n| thomson | cathode - ray tube | | |\n| rutherford | gold | | |\n| | n/a | | electrons travel around the nucleus in well - defined paths called orbits (like planets in a solar system) |\n| | n/a | | electrons have distinct amounts of energy and move in areas called orbitals. developed after the fundamental discovery that energy can behave as both waves & particles |
Answer
Brief Explanations:
Thomson discovered the electron using a cathode - ray tube and proposed the plum - pudding model of the atom. Rutherford's gold foil experiment led to the discovery of the atomic nucleus, and his model showed a small, dense, positively - charged nucleus with electrons outside. The model with electrons in well - defined orbits around the nucleus is Bohr's model. The model with electrons in orbitals with distinct energy levels is the quantum mechanical model.
Answer:
| Name of Researcher | Equipment/Experiment | Sketch of Model | Major Idea/Discovery |
|---|---|---|---|
| Dalton | N/A | N/A | All atoms of a given element are identical in mass and properties |
| Thomson | Cathode - ray tube | Plum - pudding model (a sphere of positive charge with electrons embedded) | Discovery of the electron |
| Rutherford | Gold foil experiment | Nuclear model (small, dense nucleus with electrons outside) | Discovery of the atomic nucleus |
| Bohr | N/A | Planetary model (electrons in orbits around nucleus) | Electrons travel around the nucleus in well - defined paths called orbits |
| Quantum Mechanics Scientists (e.g., Schrödinger etc.) | N/A | Orbital model (electrons in orbitals with distinct energy levels) | Electrons have distinct amounts of energy and move in areas called orbitals |