Periodic Table

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Across
  1. 4. The number of protons in the nucleus of atom.
  2. 5. A vertical column of elements in the periodic table.
  3. 8. The non-metallic elements in group 17 that have colored vapors.
  4. 11. The soft metal elements in group 1 that are very reactive in water.
  5. 12. The silvery-white elements in group 2 that are somewhat soft and reactive
  6. 14. The total number of protons and neutrons in the nucleus of an atom
Down
  1. 1. The metallic elements within groups 3 and 12 in the periodic table.
  2. 2. The non-flammable, odorless, and nonreactive elements in group 18.
  3. 3. The name of the elements that do not have properties of a metal.
  4. 6. Elements such as boron and silicon that are neither metals nor nonmetals
  5. 7. Matter made up of one kind of atom.
  6. 9. The elements that are good conductors of heat and electricity.
  7. 10. A horizontal row of elements in the periodic table
  8. 13. Devised the periodic law and created framework that became the modern periodic table.