Science

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Across
  1. 3. Any substance that has mass and volume
  2. 5. A pure substance that cannot be separated into simpler substances by physical or chemical means
  3. 7. Neutrally charged particle inside the nucleus
  4. 8. A pure substance composed of 2 or more atoms
  5. 12. Positively charged particle inside the nucleus
  6. 14. A pure substance that is created by 2 or more different elements chemically reacting and joining together
  7. 15. A mixture that is unevenly distributed the parts can be seen
Down
  1. 1. Negatively charged particle that orbits the nucleus
  2. 2. The number of electrons on the outer ring of an atom
  3. 4. The number that equals the protons and neutrons in an atom
  4. 6. A sample of matter that has a definite chemical and physical properties and can not be broken down physically
  5. 7. The center of an atom that contains the protons and neutrons
  6. 9. The physical combination of 2 or more substances can be separated by physical means
  7. 10. The smallest unit of matter
  8. 11. A mixture that is evenly distributed the parts cannot be seen also known as a solution
  9. 13. The number that equals the protons in an atom