Introduction to Chemistry

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Across
  1. 4. A process in which substances are transformed into new substances.
  2. 5. The force that holds atoms together in a molecule.
  3. 8. A neutral particle found in the nucleus of an atom.
  4. 9. The scientist who discovered the neutron.
  5. 12. The scientist who discovered the nucleus using the gold foil experiment.
  6. 13. A chart that organizes all known elements by their properties.
  7. 14. The scientist who discovered the electron.
  8. 15. A pure substance made up of only one type of atom.
  9. 18. The scientist who proposed electrons move in fixed orbits around the nucleus.
  10. 20. A negatively charged particle that orbits the nucleus.
Down
  1. 1. Atoms of the same element with different numbers of neutrons.
  2. 2. The scientist who is known as the "Father of Modern Chemistry."
  3. 3. A substance made from two or more different elements chemically bonded.
  4. 6. Two or more atoms bonded together.
  5. 7. The scientist who proposed the atomic theory in the early 1800s.
  6. 10. An atom or molecule with a charge due to loss or gain of electrons.
  7. 11. The scientist who proposed the idea of the mole and Avogadro’s number.
  8. 16. The central part of an atom containing protons and neutrons.
  9. 17. A positively charged particle found in the nucleus of an atom.
  10. 19. The smallest unit of matter that retains the properties of an element.