Periodic Table

Edit Answers
1234567891011121314151617181920
Across
  1. 5. an ion with a positive chage
  2. 6. another name for metalloid
  3. 8. any atoms having the same number of protons but a different number of neutrons
  4. 11. another name for period
  5. 12. the elemnts that are usually poor conductors of heat and electricity
  6. 15. electron an electron in the outermost energy level of an atom
  7. 19. a horizontal row of elements in the periodic table
  8. 20. the smallest particle that has the properties of an element
Down
  1. 1. a positively charged subatomic particle in the nucleus of an atom
  2. 2. the center of an atom; made up of protons and neutrons
  3. 3. an ion with a negative charge
  4. 4. an element that has properties of both a metal and nonmetal
  5. 7. a negatively charged subatomic particle found in the energy level of an atom
  6. 9. a vertical column of elements in the periodic table
  7. 10. the elements thta are good conductors of heat and electricity
  8. 13. a neutral subatomic particle in the nucleus of an atom
  9. 14. another name for group
  10. 16. number the number of protons in the nucleus of an atom
  11. 17. level any of the possible energies an electron may have in an atom
  12. 18. number the total number of protons and neutrons in the nucleus of an