Joelys Chapter 5 crossword

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Across
  1. 3. The basic unit of an element
  2. 5. Electrons in the outer shell of an atom
  3. 11. The way atoms are arranged in a compound
  4. 12. An atom with a positive or negative charge
  5. 13. A negatively charged ion
  6. 16. Two or more atoms held together by bonds
  7. 18. A particle in the nucleus with no charge
  8. 19. A force that holds atoms together
Down
  1. 1. A positively charged particle in the nucleus
  2. 2. When atoms have full outer shells
  3. 4. A positively charged ion
  4. 6. A substance made of two or more elements
  5. 7. Shows the elements in a compound
  6. 8. Atoms want 8 electrons in their outer shell
  7. 9. Something that takes part in a chemical reaction
  8. 10. Needed to form or break chemical bonds
  9. 12. A bond formed when electrons are transferred
  10. 14. A tiny, negatively charged particle in an atom
  11. 15. A bond formed when electrons are shared
  12. 17. A pure substance made of one kind of atom