Atomic structure

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 1. Of or relating to or comprising atoms (6)
  2. 4. Happening or recurring at regular intervals (8)
  3. 6. How much matter something contains (4)
  4. 8. Ammunition consisting of a cylindrical metal casing containing an explosive charge and a projectile (5)
  5. 10. A substance formed by chemical union of two or more elements or ingredients in definite proportion (8)
  6. 11. An abstract part of something (7)
  7. 12. An electrical force linking atoms (4)
  8. 13. A stable particle with positive charge equal to the negative charge of an electron (6)
  9. 14. Two or more atoms bound together as a single unit and forming part of a molecule (5)
  10. 15. Center of an atom or a cell (7)

Down

  1. 2. One of two or more atoms with the same atomic number but with different numbers of neutrons (7)
  2. 3. Furniture with legs and a flat top (5)
  3. 5. An elementary particle with negative charge (8)
  4. 7. The property possessed by a sum or total or indefinite quantity of units or individuals (6)
  5. 9. An elementary particle with 0 charge and mass about equal to a proton (7)