Atoms

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Across
  1. 1. A tabular array of the chemical elements organized by atomic number
  2. 2. A stable subatomic particle with a charge of negative electricity
  3. 5. a variable (often denoted by y ) whose value depends on that of another
  4. 6. a set of principles on which the practice of an activity is based.
  5. 7. the basic unit of a chemical element.
  6. 8. A subatomic particle without an electric charge.
  7. 9. The theory that all matter is made up of tiny indivisible particles (atoms).
Down
  1. 1. A stable subatomic particle.
  2. 3. Particle any of numerous subatomic constituents of the physical world that interact with each other
  3. 4. It is a variable that stands alone and isn't changed