Physical Science Module 13 Vocabulary

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Across
  1. 5. The current, very complex, model of the atom which relies heavily on higher math
  2. 8. An atom with a nucleus that is not stable
  3. 10. Bohr Scientist who proposed a model for the atom that has protons and neutrons in the nucleus with electrons orbiting like planets
  4. 11. The time it takes for half of the original sample of a radioactive isotope to decay
  5. 13. Atoms with the same number of protons but different numbers of neutrons
  6. 14. Largest subatomic particle with no charge; resides in the nucleus of an atom
Down
  1. 1. The number of protons in an atom
  2. 2. The sum of the numbers of neutrons and protons in the nucleus of an atom
  3. 3. The center of an atom, containing the protons and neutrons
  4. 4. A chart that organizes atoms by grouping them in terms of how many protons they have
  5. 6. than electrons, but slightly smaller than neutrons
  6. 7. A schematic description of a system that accounts for its known properties
  7. 9. Negatively charged subatomic particle that resides far outside the nucleus of an atom; smallest of the three particles
  8. 12. positively charged subatomic particle that resides in the nucleus of an atom; 2000x