Elizabeth's Periodic Table

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12345678910111213141516171819
Across
  1. 4. A chemical bond formed when two atoms share electrons.
  2. 5. A horizontal row of elements.
  3. 7. The gradual wearing away of a metal due to a chemical reaction.
  4. 8. The average mass of all the isotopes of an element.
  5. 15. has the atomic number 21
  6. 16. A class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity.
  7. 17. The ability of an object to transfer heat.
  8. 18. When an element combines or reacts.
  9. 19. A one or two letter representation of an element.
Down
  1. 1. The way a mineral reflects light from its surface.
  2. 2. Elements in the same vertical column.
  3. 3. The ability of an object to carry electric current.
  4. 6. A term used to describe a material that can be pulled out into a long wire.
  5. 9. has the atomic number 11
  6. 10. A term used to describe materials that can be hammered or rolled into flat sheets.
  7. 11. has the atomic number
  8. 12. An element that lacks most properties of a metal.
  9. 13. An element that has some characteristics of metals and nonmetals.
  10. 14. An arrangement of the elements.