History Of The Atom

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Across
  1. 3. Matter is made of particles, cathod rays found Electrons, discovered positively charged particles
  2. 5. He made the Plum Pudding model
  3. 9. Everything is made up of fire, water, earth, and wind
  4. 11. The path of electrons in a model based on the amount of energy they posses
  5. 13. A compound, no matter what its source, always contains definite, or constant, proportions of its elements by mass
  6. 15. He further experimented with Thomson's model and made a gold foil experiment
Down
  1. 1. When elements combine, they do so in the ratio of small whole numbers
  2. 2. Developed the "atomos" theory
  3. 4. There is a circle in the middle acting as the nucleus and there are electrons rotating around it
  4. 6. He believed that all matter consists of 4 elements
  5. 7. The school teacher who developed a theory involving the relationship between matter and the atom
  6. 8. believed that all matter was divisible to a point where no more division was possible
  7. 10. Belief that electrons exist in an "Area" not a certain "Path"
  8. 12. He created the planetary model
  9. 14. Matter is made of tiny particles called atoms, atoms of the same element are alike but isotopes are somewhat different in mass, and atoms of different elements can join to form molecules