NEET Physics Nuclei Questions Solved


If half life of radium is 77 days. Its decay constant in day will be
(a) 3×10-13/day            (b) 9×10-3/day
(c) 1×10-3/day              (d) 6×10-3/day

(b) λ=0.693T1/2=0.69377=9×10-3/day

Difficulty Level:

  • 16%
  • 58%
  • 27%
  • 0%