Across
- 4. shows lines of different wavelengths
- 7. One of the foremost scientists of the 20th century
Down
- 1. Has an atomic number of 107
- 2. Won noble prize in it
- 3. The City he was born in
- 5. Niles Bohr studied under the well known physics professor
- 6. Married her in 1912
- 8. Developed the model using the hydrogen atom