Intro Chemistry

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Across
  1. 4. The center of the atom.
  2. 8. A process that rearranged atoms to make new compounds.
  3. 9. A substance made of 2 or more atoms bonded together.
  4. 10. The type of energy that is stored in chemical bonds.
  5. 12. The property needed to do work or produce heat.
Down
  1. 1. When a reaction has an equal number of each element on both sides of the arrow it is called __________.
  2. 2. A particle in an atom with a neutral charge.
  3. 3. The smallest unit of a compound.
  4. 5. A pure substance made of only one kind of atom.
  5. 6. A particle in an atom with a negative charge.
  6. 7. The smallest unit of an element.
  7. 11. A particle in an atom with a positive charge.