Chapter 2: Atoms, Molecules, and Ions

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Across
  1. 5. The elements in group 1 of the periodic table are ______ metals
  2. 6. Discovered the electron using cathode ray tube(last name)
  3. 8. ______ number is found by adding the number of protons and neutrons
  4. 10. Smallest particle of an element that can enter into a chemical reaction
  5. 11. Negatively charged particles found outside nucleus
  6. 14. Negatively charged ions
  7. 16. Positively charged ions
  8. 17. Discovered the nucleus using gold foil experiment(last name)
  9. 18. Polonium is a ______
  10. 19. Positively charged particle found in nucleus
Down
  1. 1. Acids always have at least one ______ atom
  2. 2. Elements in group 17 of the periodic table are called ______
  3. 3. _____particle emission is when a helium nucleus is given off
  4. 4. Gamma radiation emits ________
  5. 7. Arsenic is a ______
  6. 9. _____number is equal to the number of protons
  7. 12. Beta emission produces a/an ______
  8. 13. Hydrogen is a ______
  9. 14. Unit for atomic mass
  10. 15. Atom containing same number of protons but not neutrons