Atoms & Elements

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Across
  1. 4. a pure chemical substance that cannot be physically split into a more simple substance. Each is made of one type of atom.
  2. 5. the smallest particle of an element that can exist
  3. 6. a particle of matter that has a positive electrical charge and forms part of the nucleus of an atom.
  4. 8. to join through a chemical reaction
  5. 9. a particle of matter that has no electrical charge and forms part of the nucleus of an atom.
  6. 10. the center of an atom which contains most of the atom's mass
Down
  1. 1. anything that has mass and takes up space
  2. 2. a particle of matter that has a negative electrical charge and travels around the nucleus of an atom.
  3. 3. two or more elements bonded together
  4. 7. the smallest particle of a substance that retains all the substance's properties. It is composed of one or more atoms.