Physical Science Crossword

123456789101112131415161718192021222324
Across
  1. 1. Vertical columns of the periodic table.
  2. 6. Scientist who arranged the periodic table by atomic number.
  3. 8. The particle with no charge found in the nucleus.
  4. 10. Number of protons in an atom.
  5. 12. The particle with a negative charge.
  6. 13. Elements that can act like metals or nonmetals depending on conditions.
  7. 15. The central region of an atom.
  8. 17. Elements in Group 1, highly reactive with water.
  9. 18. Elements found in the “stair-step” line, semiconductors.
  10. 19. The modern periodic table is arranged by increasing ______ number.
  11. 21. Scientist who first organized the table by atomic mass.
  12. 22. Shiny elements that are good conductors of heat and electricity.
  13. 24. Trend: Atomic size ______ as you go down a group.
Down
  1. 2. The particle with a positive charge.
  2. 3. Ability of an atom to attract electrons in a bond.
  3. 4. Most abundant element in the universe.
  4. 5. Group 18 elements, stable and unreactive.
  5. 7. Horizontal rows of the periodic table.
  6. 9. Elements that are dull, brittle, and poor conductors of electricity.
  7. 11. Smallest unit of matter.
  8. 14. Group 2 elements, reactive but less so than Group 1.
  9. 16. Atomic number 79, symbol Au.
  10. 20. Elements in Group 17, also called “salt formers.”
  11. 23. Energy needed to remove an electron.