Physics Crossword

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Across
  1. 2. you can find the ..... number along the top of the periodic table
  2. 5. (2 words no space) protons+neutrons=
  3. 6. name what orbits the nucleus of an atom
  4. 8. what is the shell arrangement i.e. how many electrons go into each shell layer (4 numbers typed out)
Down
  1. 1. what determines the mass number in an isotope
  2. 3. (2 words no space) number of proteins
  3. 4. the process in which a solid turns to gas or vice versa
  4. 7. you can find the ...... of an element along the side of the periodic table