Chap 4 Crossword

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Across
  1. 5. A region inside the atom where an electron probably exists
  2. 6. Indicates how many electrons exist in each energy level and sublevel of the atom or ion (2 words)
  3. 8. Each element has a particular set of _______ __________ that are allowed (2 words)
  4. 9. A shorthand notation for electron configurations that begins with the previous ___________ ___________ written in square brackets
Down
  1. 1. A pattern unique to the element. Forms when electrons relax to lower energy levels. Consists of distinct colors (photons) interspersed with gaps (2 words)
  2. 2. Each energy level has a fixed number of __________
  3. 3. ___________ model: treats the electron as both wave and particle
  4. 4. The periodic table is subdivided into four ________ based on the highest energy of occupied sublevels
  5. 7. ____________ shell: outermost energy level of the atom, having the highest principal quantum number