| Date | May 2010 | Marks available | 1 | Reference code | 10M.1.SL.TZ1.1 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Question number | 1 | Adapted from | N/A |
Question
The best estimate for the time it takes light to cross the nucleus of the hydrogen atom is
A. 10−23 s.
B. 10−20 s.
C. 10−15 s.
D. 10−7 s.
Markscheme
A
Examiners report
[N/A]
