At t = 0 there are 6 x 1023 radioactive atoms of a substance, which decay with a disintegration constant (A,) equal to 0.01/sec. What would be the initial decay rate?: (A) 6 x 1023, (B) 6 x 1022, (C) 6 x 1021, (D) 6 x 1021
Answer is C. Ans. 6 x 1021