Periodic Table Crossword

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Across
  1. 3. (The only) metal that is liquid at room temperature (hint: find the symbol Hg)
  2. 5. Shiny yellow metal used in jewelry
  3. 6. Element with atomic number 53
  4. 7. The dense center of an atom that contains protons and neutrons
  5. 10. Element with symbol Ag
  6. 11. Particle in the nucleus with no electric charge
  7. 14. Category of element that is shiny and can be shaped easily
  8. 15. Negatively charged particle found around the nucleus
  9. 16. Element you need to live that you are breathing right now
  10. 18. Element with properties in between metals and nonmetals
  11. 19. Element with atomic mass of 40
  12. 20. Smallest building block of matter that retains the properties of an element
Down
  1. 1. The first element (by atomic number); also most abundant element in the Universe
  2. 2. Each row of the periodic table is called a
  3. 4. Category of element that is usually dull and brittle
  4. 8. Positively charged particle in the nucleus of an atom
  5. 9. Fill in the blank: the ___ table of elements
  6. 12. A substance that contains only one type of atom
  7. 13. The element in the second period and rightmost group of the Periodic Table
  8. 17. Each column of the periodic table where elements have similar properties is called a