Chemistry Crossword

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Across
  1. 3. the electrons are arranged in an electron __
  2. 4. __ number = number of protons in an atom
  3. 5. forms when an atom loses or gains electrons
  4. 7. __ number = no. of protons + no. of neutrons
  5. 8. has a relative charge of +1 in an atom
  6. 10. sodium is an example of a __
  7. 11. has a relative charge of 0 in an atom
  8. 12. __ ions are formed when atoms gain electrons
  9. 14. __ ions are formed when atoms lose electrons
Down
  1. 1. has a relative charge of -1 in an atom
  2. 2. ionic bonds are formed from the __ of electrons
  3. 6. chlorine is an example of a __
  4. 9. smallest particle of an element
  5. 12. elements in group viii are called __ gases
  6. 13. metals and non-metals can form __ bonds