Periodic Table

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Across
  1. 1. table / A table of the elements
  2. 3. / Has 1 proton
  3. 4. / What surrounds the nucleus in an electric cloud?
  4. 7. / Has the atomic number 70
  5. 9. / An element with the symbol 'Xe'
  6. 12. Number / The number of protons in an atom
  7. 14. / Positively charged subatomic particles
  8. 17. / Protons are found in the _______ of an atom.
  9. 19. / Columns on the periodic table
  10. 20. / The smallest unit of matter
  11. 21. Number / The number of protons in an atom
Down
  1. 2. Symbol / The symbol of an element
  2. 5. / Has an atomic mass of 261
  3. 6. / Has a mass number of 20
  4. 8. / Atomic mass is 55.85
  5. 10. / Subatomic particles with no charge
  6. 11. Number / The total number of neutrons and protons in the nucleus
  7. 13. / An element with 92 protons and electrons
  8. 15. / The atomic number is also the number of electrons in _______ atoms.
  9. 16. / Rows on the periodic table
  10. 18. Particles / The smaller parts that make up an object