The Decay Constant of a Radioactive Nuclide Is 1

Multiple Choice

The decay constant of a radioactive nuclide is 1.6 ×10^-3s^-1.At a given instant,the number of atoms of the radioactive nuclide is 1.85 ×10¹².The number of atoms of the nuclide that remain after a time interval of 30 minutes is closest to:

A) 1.04 × 10¹¹
B) 1.14 × 10¹¹
C) 1.26 × 10¹¹
D) 1.38 × 10¹¹
E) 1.52 × 10¹¹