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1. |
Mass of neutron is________________? |
A. | 1.67 x 10-31 kg |
B. | 1.67 x 10-27 kg |
C. | 9.1 x 10-31 kg |
D. | 1.67 x 10-19 kg |
Answer» C. 9.1 x 10-31 kg | |