The Structure of Atoms

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Across
  1. 4. A number equal to the number of protons in the nucleus of an atom.
  2. 8. A tiny particle in the nucleus of an atom.
  3. 9. The form that matter has--solid, liquid, or gas.
  4. 10. Matter that has only one kind of atom
  5. 11. The central part of an atom.
  6. 15. A substance that is formed when atoms of two or more elements join together.
  7. 17. A number equal to the sum of the numbers of protons and neutrons in an atom of an element.
Down
  1. 1. A tiny Particle in the nucleus of an atom.
  2. 2. A very hot gas made of particles that have an electric charge.
  3. 3. A tiny particle in the nucleus of an atom that is similar to a proton in size.
  4. 5. A picture, an idea, or an object that is built to explain how something else looks or works.
  5. 6. A form of matter that has no definite shape or volume.
  6. 7. The smallest particle of a substance that has the same properties as the substance.
  7. 12. A form of matter that has a definite volume but no definite shape.
  8. 13. An element found in nature.
  9. 14. A form of matter that has a definite shape and volume.
  10. 16. The building block of matter.