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				| 1. | According to Bohr model, the radius of the electron orbit in the n = 1 level of the hydrogen atom is 0.053 nm. The radius for the n = 3 level is: | 
| A. | 0.006 nm | 
| B. | 0.018 nm | 
| C. | 0.159 nm | 
| D. | 0.477 nm | 
| Answer» E. | |