Chemistry Crossword

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Across
  1. 3. change where atoms are rearranged to form new substances
  2. 5. name of group 18 elements with full valence shells
  3. 8. attraction an element has for electrons
  4. 10. have no charge, located in the nucleus
  5. 11. covalent bond with an equal sharing of electrons
  6. 13. type of decay that emits a particle with the largest mass
  7. 14. nuclear energy produced when One larger nuclei splits into 2 smalle
  8. 15. Compound made when a metal transfers electrons to a nonmetal
  9. 16. when bonds are ________, energy is absorbed
  10. 18. Charge of a metal ion
  11. 21. 2 atoms with the same number of protons, but different number of neutrons
  12. 22. covalent bond with an unequal sharing of electrons
Down
  1. 1. amount of time it takes for half a radioisotope to decay
  2. 2. electrons in the outer shell of an atom
  3. 4. nuclear energy produced when 2 smaller nuclei combine to make a bigger one
  4. 6. Compound made when two Nonmetals share electrons
  5. 7. Charge of a nonmetal ion
  6. 9. state when one electron jumps from an inner to an outer shell
  7. 12. atomic number is the number of _________ in an atom
  8. 17. protons + neutrons
  9. 19. when an atom gains or loses electrons it forms a _____
  10. 20. two or more atoms chemically combined in a fixed proportion