Periodic table

1234567891011
Across
  1. 5. the neutral charge in a nucleus
  2. 7. positive charge in the nucleus
  3. 8. the elctrons that determain the reactivity of an element
  4. 9. Natural materials that do not produce heat or electricity and are structurally fragile
  5. 11. an elements intermediate in properties between the typical metals and nonmetals
Down
  1. 1. he basic building block of chemistry
  2. 2. the negative charge in the nucleus
  3. 3. a column in the periodic table of the chemical elements
  4. 4. a horizontal row in which all the elements in that row
  5. 6. items that can't be easily broken into smaller pieces
  6. 10. lustrous elements that are good conductors of heat and electricity