8 Matter and Energy U3 L3 Electrons and Chemical Boding

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Across
  1. 2. Electrons found in the outermost energy level of an atom are called ____ ____
  2. 4. How many electrons does an oxygen atom have ____
  3. 8. A ____ ____ molecule forms when a bond is made between a hydrogen atom and a chlorine atom
  4. 10. Chemical changes ____ the identity of substances
  5. 11. This model ____ ____ shows how electrons are found in a region around the nucleus
  6. 13. ____ ____ allows atoms to fill their outermost energy level
  7. 14. This model shows atoms represented as solid spheres ____ ____
  8. 15. Each ____ level can hold a specific number of electrons
Down
  1. 1. This is an interaction that holds atoms or ions together ____ ____
  2. 3. In order for atoms to be ____ chemical bonds have to be formed or broken
  3. 5. This can show the number of valence electrons ____ ____
  4. 6. Atoms join together to form ____ bonds
  5. 7. This is one of the three models used to represent atoms
  6. 8. In a ____ molecule, 2 of these molecules are connected by bond
  7. 9. This is the energy level furthest from the nucleus ____
  8. 12. This is a group of atoms that are held together by chemical bonds