NEET Physics Nuclei Questions Solved


The decay constant of radium is 4.28×10-4 per year. Its half life will be 
(a) 2000 years        (b) 1240 years
(c) 63 years            (d) 1620 years

(d) T=0.6931×1λ=0.6931×14.28×10-4year = 1620 years

Difficulty Level:

  • 6%
  • 23%
  • 12%
  • 62%
Crack NEET with Online Course - Free Trial (Offer Valid Till August 26, 2019)