Lesson 4 Vocabulary

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Across
  1. 3. groups 13-18 on the periodic table except for helium
  2. 4. an element that is dull, brittle, and a poor conductor of heat and electricity
  3. 5. an element that exhibits some properties of metals and some properties of nonmetals
  4. 7. groups 1 and 2 on the periodic table plus helium
  5. 8. the simplest form of chemical substance which is made up of only one type of atom
  6. 10. one of 18 vertical columns on the periodic table
  7. 12. the number of protons in the nucleus of an atom; determines what element an atom is
  8. 13. groups 3-12 on the periodic table
Down
  1. 1. made up of the lanthanides and actinides; the bottom two detached rows of the periodic table
  2. 2. the arrangement of electrons around the nucleus of an atom
  3. 5. an element that is shiny, malleable, ductile and a good conductor of heat and electricity
  4. 6. one or two letters that represent an element; the first letter must be capitalized and the second must be lowercase
  5. 9. the average mass of an atom of a particular element
  6. 11. one of seven horizontal rows on the periodic table