Periodic Table Crossword by: Megan Yaryan

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Across
  1. 4. horizontal row
  2. 5. one of the basic substances that are made of atoms of only one kind and that cannot be separated by ordinary chemical means into simpler substances
  3. 9. negatively charged particle
  4. 10. the number of positive charges or protons in the nucleus of an atom of a given element
  5. 11. any of the chemically inert gaseous elements of group 8A or 0 of the periodic table: helium, neon, argon, krypton, xenon, and radon.
  6. 13. the mass of an isotope of an element
  7. 17. neutrally charged particle
  8. 18. a member of the actinide series
  9. 19. groups of elements that have the properties of opacity, ductility, conductivity, and a unique luster
Down
  1. 1. vertical column
  2. 2. letter or letters representing an element
  3. 3. a tabular arrangement of the chemical elements according to atomic number as based on the periodic law
  4. 6. an element not having the character of a metal, as carbon or nitrogen.
  5. 7. characteristics of an element
  6. 8. tending to react
  7. 12. any element of the lanthanide series Also called rare earth, rare-earth element
  8. 13. smallest particle of matter
  9. 14. an element that has both metallic and nonmetallic properties, as arsenic, silicon, or boron
  10. 15. metal any of the group of univalent metals including potassium, sodium, lithium, rubidium, cesium, and francium, whose hydroxides are alkalis.
  11. 16. positively charged particle