Theory of Atoms

12345678910
Across
  1. 4. Pure substance that cannot be divided into a simpler substance.
  2. 5. True or False? You can not see atoms.
  3. 7. The small dense center of an atom that has a positive charge and is surrounded by moving elements.
  4. 8. What is matter made up of?
  5. 9. Which particles do not affect the charge of an atom
  6. 10. Atoms are the _______ unit of an element.
Down
  1. 1. An element is composed of only ____ type of atom.
  2. 2. The number of protons in the nucleus of an atom.
  3. 3. Which particles change the name of the atom.
  4. 6. Which particles do not affect the mass of an atom.