The Atom

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Across
  1. 5. When the number of protons is the same as the number of electrons, the atom is ___________.
  2. 7. This element has the atomic number 117.
  3. 9. The negative subatomic particle.
  4. 10. This model shows all of the electrons that an atom has on each shell.
  5. 11. The most common isotope of this element has 1 proton, 1 electron, and 0 neutrons.
  6. 12. This element has the atomic number 6.
  7. 14. When the number of protons is not equal to the number of neutrons
  8. 15. (two words, no space) Refers the number of protons in an atom
  9. 17. The inner most shell can only have this many electrons (spell the number).
  10. 18. Basic building block of all matter
  11. 19. The neutral subatomic particle.
Down
  1. 1. When the number of protons is not equal to the number of electrons
  2. 2. We still use this guys model of the atom 100+ years later.
  3. 3. The positive subatomic particle.
  4. 4. These electrons are in the outer-most shell of the atom.
  5. 6. Atoms are so small, they cannot be seen on this device
  6. 8. __________ particles make up atoms.
  7. 11. This element as the atomic number 2.
  8. 13. Describes electron movement.
  9. 15. (two words, no space) Protons + neutrons = ?
  10. 16. Protons and neutrons both weigh this many amu (spell the number).