the particle model and atomic structure

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Across
  1. 2. In 1903, this scientists showed that electrons in the orbiting shells are attracted the the negatively charged nucleus.
  2. 3. The smallest particle of an element that still has its chemical properties
  3. 6. A change that produces one or more new substances
  4. 9. Atoms of an element with the same number of electrons and protons but different number of neutrons
  5. 12. this model shows how particles are arranged in a solid, liquid and gas
  6. 13. Charged particles, formed when atoms gain or lose electrons
  7. 14. When a substance changes shape or state, no new substance it made
  8. 15. The total number of protons and neutrons
  9. 16. A tiny bit of matter, they can be large enough to see or too small to see, even with a microscope
  10. 17. An example of an element, with the chemical symbol Au
  11. 18. John ______ suggested, kin 1803, all atoms are made from atoms and all atoms of an element are identical
Down
  1. 1. An example of a chemical change
  2. 4. Devised the plumb pudding model in 1987, suggesting all atoms contain electrons and atoms are neutral overall
  3. 5. Everythign around you is made from this. Begins with 'm'
  4. 7. Forces between atoms in molecules. Begins with 'b'
  5. 8. These are subatomic particles that are neutral in charge and are found in the nucleus of an atom
  6. 10. These are subatomic particles that are negatively charged and belong in the shells of an atom
  7. 11. Made from two or more atoms joining together
  8. 14. These are subatomic particles that are positively charged and are in the nucleus of an atom