Unit 3 PS The Structure of Matter

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