Periodic Table

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Across
  1. 3. Representing/ standing for something or someone
  2. 4. Mendeleev Scientist who discovered a set of patterns that apply to all elements
  3. 7. What is the smallest particle
  4. 8. One of the things they look for in an element. The point at which something melts.
  5. 9. How many elements are on the periodic table now?
  6. 10. Average mass of all the isotopes of that element
Down
  1. 1. An abbreviation for an element
  2. 2. A table in which all the elements are on
  3. 5. How many elements were found by 1869-spelled out
  4. 6. A number showing where an element is on the table. Also shows the protons and neutrons