Periodic Table Vocabulary

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Across
  1. 4. an element that lacks most of the properties of a metal
  2. 5. the average mass of all the isotopes of an element
  3. 8. the sum of protons and neutrons in the nucleus of an atom.
  4. 9. Gases an element in group 18 of the periodic table →stable → Inert→ outer shell is full
  5. 10. an element that has some characteristics of both metals and nonmetals
  6. 11. a horizontal row of elements in the periodic table
  7. 13. the number of protons in the nucleus of an atom
  8. 14. the father of chemistry
Down
  1. 1. a class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity
  2. 2. a one or two letter representation of an element
  3. 3. the placement of electrons in shells.
  4. 6. electrons in the outermost shell.
  5. 7. a chart of the elements showing the repeating pattern of their properties
  6. 12. elements in the same vertical column of the periodic table