The Half-Life of Radon-222 Is $3.83 \mathrm {~d}$ If a Sample of Radon Initially Contains

Multiple Choice

The half-life of radon-222 is $3.83 \mathrm {~d}$ . If a sample of radon initially contains $6.00 \times 10 ^ { 8 }$ radon atoms, how many of them are left after $10.0 \mathrm {~d}$ ?

A) $7.29 \times 10 ^ { 8 }$
B) $9.82 \times 10 ^ { 7 }$
C) $7.67 \times 10 ^ { 7 }$
D) $8.34 \times 10 ^ { 8 }$
E) $8.56 \times 10 ^ { 8 }$