| 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. \({10^{ - 23}}{\text{ s}}\).
B. \({10^{ - 20}}{\text{ s}}\).
C. \({10^{ - 15}}{\text{ s}}\).
D. \({10^{ - 7}}{\text{ s}}\).
Markscheme
A
Examiners report
[N/A]
