Science Extra Credit Marking Period 3

12345678910111213141516171819
Across
  1. 7. the number of protons and electrons in an atom
  2. 10. made up of tiny particles allowing it to flow and create the shape of the container
  3. 12. atoms with the same number of protons but different number of neutrons
  4. 13. the simplest form of matter made up by one atom
  5. 14. a thing that is composed of two or more separate elements
  6. 16. an atom that gains electrons
  7. 18. one type of atom that cannot be picked apart physically
  8. 19. central region of an atom made up of protons and neutrons
Down
  1. 1. a table of chemical elements arranged by atomic number
  2. 2. a negatively charged particle
  3. 3. the smallest and basic unit of a chemical element
  4. 4. has a definite shape and mass and volume and doesn’t move to fit its container
  5. 5. a particle that is neutral and has no charge
  6. 6. a group of atoms bonded together creating a small chemical compound so it can take part in a chemical reaction
  7. 8. anything that takes up space and has volume and mass
  8. 9. a positively charged particle
  9. 11. atoms that gain or lose electrons
  10. 13. the system of electrons surrounding the nucleus
  11. 15. has no fixed shape and no fixed volume
  12. 17. an atom that loses electrons