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History of the Atom
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Democritus: Thought all matter is composed of indivisible elements.
Aristotle: Believed all substances came from earth, air, fire, or water.
Dalton: Developed the atomic theories and proposed atoms were spherical & in motion.
Crookes: Constructed the 1st cathode ray tube.
Curies: Worked with radioactive particles & theorized they caused atoms to break down & release radiation.
Thomson: Used cathode rays to discover the electron.
Planck: Introduced the quantum theory and what are now known as photons.
Einstein: Developed the theory of relativity and hypothesized about the particle nature of light that sill holds true today.
Millikan: Measured the charge of a single electron.
Rutherford: Performed the "gold foil" experiment that discovered the nucleus.
Bohr: Made an atomic model where the electrons traveled in orbits around the nucleus.
Shrodinger: Developed an mathematical equation and lead to the electron cloud model.
Chadwick: Discovered the neutron that added mass to the nucleus.
Hahn: Is known as the father of nuclear fission.
Seaborg: Discovered the transuranium elements & helped advance nuclear medicine.
GellMann: Proposed the quark model.
Electron: The negatively charged particle of the atom that is found outside of the nucleus.
Proton: The positively charged particle of the atom that is found inside the nucleus.
Neutron: The neutral particle of the atom that is found inside the nucleus and adds mass to the nucleus.
History of the Atom
Across:1. | Proposed the quark model. | 3. | Discovered the transuranium elements & helped advance nuclear medicine. | 5. | The negatively charged particle of the atom that is found outside of the nucleus. | 8. | Discovered the neutron that added mass to the nucleus. |
| 11. | Developed the theory of relativity and hypothesized about the particle nature of light that sill holds true today. | 13. | Constructed the 1st cathode ray tube. | 15. | The positively charged particle of the atom that is found inside the nucleus. | 16. | Used cathode rays to discover the electron. |
| | Down:2. | Believed all substances came from earth, air, fire, or water. | 3. | Developed an mathematical equation and lead to the electron cloud model. | 4. | Measured the charge of a single electron. | 6. | Performed the "gold foil" experiment that discovered the nucleus. | 7. | Developed the atomic theories and proposed atoms were spherical & in motion. |
| 9. | Is known as the father of nuclear fission. | 10. | Thought all matter is composed of indivisible elements. | 12. | The neutral particle of the atom that is found inside the nucleus and adds mass to the nucleus. | 13. | Worked with radioactive particles & theorized they caused atoms to break down & release radiation. | 14. | Made an atomic model where the electrons traveled in orbits around the nucleus. |
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© 2015
PuzzleFast.com, Noncommercial Use Only
History of the Atom
Across:1. | Proposed the quark model. | 3. | Discovered the transuranium elements & helped advance nuclear medicine. | 5. | The negatively charged particle of the atom that is found outside of the nucleus. | 8. | Discovered the neutron that added mass to the nucleus. |
| 11. | Developed the theory of relativity and hypothesized about the particle nature of light that sill holds true today. | 13. | Constructed the 1st cathode ray tube. | 15. | The positively charged particle of the atom that is found inside the nucleus. | 16. | Used cathode rays to discover the electron. |
| | Down:2. | Believed all substances came from earth, air, fire, or water. | 3. | Developed an mathematical equation and lead to the electron cloud model. | 4. | Measured the charge of a single electron. | 6. | Performed the "gold foil" experiment that discovered the nucleus. | 7. | Developed the atomic theories and proposed atoms were spherical & in motion. |
| 9. | Is known as the father of nuclear fission. | 10. | Thought all matter is composed of indivisible elements. | 12. | The neutral particle of the atom that is found inside the nucleus and adds mass to the nucleus. | 13. | Worked with radioactive particles & theorized they caused atoms to break down & release radiation. | 14. | Made an atomic model where the electrons traveled in orbits around the nucleus. |
| |
© 2015
PuzzleFast.com, Noncommercial Use Only