Periodic Table

Edit Answers
1234567891011121314151617181920
Across
  1. 1. group
  2. 3. an ion with a negative charge
  3. 5. a horizontal row of elements in the periodic table
  4. 8. the elements that are good conductors of heat and electricity
  5. 12. a negatively charged subatomic particle found in the energy level of an atom
  6. 14. a vertical column of elements in the periodic table
  7. 15. the elements that are usually poor conductors of heat and electricity
  8. 17. period
  9. 18. metalloid
  10. 20. the smallest particle that has the properties of an element
Down
  1. 2. the process of adding electrons to or removing electrons from an atom or group of atoms
  2. 4. a region in an atom where there is a high chance of finding electrons
  3. 6. a neutral subatomic particle in the nucleus of an atom
  4. 7. symbol for atomic mass unit
  5. 9. an atom or a group of atoms that has lost or gained one or more electrons and has a net electric charge
  6. 10. a positively charged subatomic particle in the nucleus of an atom
  7. 11. the center of an atom that is made up of protons and neutrons
  8. 12. any of the possible energies an electron may have in an atom
  9. 13. an ion with a positive charge
  10. 16. an element that has properties of both a metal and nonmetal
  11. 19. any atoms having the same number of protons but a different number of neutrons