Question

A radioactive substance Technetium-99 is also used by physicians to examine blood flow to
specific organs and assess organ function or bone growth. It has a very short half-life of about 6
hours. The fraction of this material that would remain after 30 hours will be

Answer 1

half life of about 6 hours

Answer:

Every 6 hours it remain half

Explanation:

Let say Original = N , After 6 hours = N/2 , Then 6+6= 12 hours = (N/2)2 = N/4 ,Then 12+6=18 hours = (N/4)2 = N/8 , Then 18+6= 24 hours = (N/8)/2 = N/16 , Then 24+6= 30 hours = ( N/16)/2 = N/32 = (1/32) N Fraction of this material that would remain after 30 hours is (1/32)N .