Scientific Atom

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Across
  1. 4. No electron.
  2. 6. Checks if it's hot or cold.
  3. 8. All matter and energy, including Earth.
  4. 9. Appears around atomic nuclei.
  5. 10. Helps people breathe.
  6. 11. Light invisible to people eyes.
  7. 12. To join together.
  8. 15. Uses glass lens to magnify small objects.
Down
  1. 1. A stream of high-speed charged particles.
  2. 2. Atoms that all have same atomic number.
  3. 3. A negative charge atom.
  4. 5. Gas surrounding Earth.
  5. 7. Clouds of fine, solid particles.
  6. 13. Small particle.
  7. 14. A colorless, odorless inert gaseous.