Level:
Project ID:
1003109203
Source Problem:
Accepted:
1
Clonable:
1
Easy:
0
The half-life of Francium is \( 21 \) minutes. How long will it take before its weight decreases from \( 512\,\mathrm{g} \) to \( 1\,\mathrm{g} \)?
\( 3 \) hours \( 9 \) minutes
\( 2 \) hours \( 48 \) minutes
\( 3 \) hours \( 30 \) minutes
\( 2 \) hours \( 27 \) minutes
\( 3 \) hours \( 51 \) minutes