Matter & Energy

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Across
  1. 3. A particle in the nucleus that has a neutral charge
  2. 4. The outer most electrons in an atom that participate in forming chemical bonds
  3. 6. Horizontal rows of elements on the periodic table that represents the number of energy levels in an atom
  4. 7. A particle outside the nucleus with a negative charge and almost no mass
  5. 9. The core of an atom that contains the protons, neutrons, and almost all of the atom's mass
  6. 10. Columns of elements on the periodic table that represent the number of valence electrons
Down
  1. 1. The elements that make up and cause a chemical reaction
  2. 2. A particle in the nucleus with a positive charge
  3. 5. A term used to describe where electrons are when they go around the nucleus of an atom
  4. 6. The substance that results from a reaction
  5. 8. The amount of space an object takes up