7th grade (CK12- Unit 2) Atoms- Vocabulary

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Across
  1. 3. negatively charged, orbiting subatomic particle
  2. 7. (amu) SI unit for the mass of an atom
  3. 8. fixed distances from the nucleus of an atom
  4. 11. state of matter without a fixed volume or shape
  5. 13. the ability to do work
  6. 14. electrons in the outer energy level
  7. 15. total number of protons & neutrons in the nucleus
  8. 16. positively charged subatomic particle
  9. 17. neutral subatomic particle inside the nucleus
  10. 22. all matter consists of constantly moving particles
  11. 23. vertical column of the periodic table
Down
  1. 1. atoms with a different number of neutrons
  2. 2. measure of the force acting on an object by gravity
  3. 4. center of the atom
  4. 5. the number of protons in the nucleus
  5. 6. area surrounding the nucleus of an atom
  6. 9. may be positive or negative
  7. 10. the simplest form of matter w/ unique properties
  8. 12. path of one object around another
  9. 18. fundamental particles in protons and neutrons
  10. 19. applied force per unit area on a surface
  11. 20. the building block of matter
  12. 21. form of matter with a definite shape and volume