Respuesta :
After 1st half life it will be 36/2 i.e. 18gm then 9 gm and then 4.5 grams simply
Hope this is what you were searching for!
Hope this is what you were searching for!
Answer:
4.5 g
Explanation:
N0 = 36 g, Let half life is T.
t = 3 T, n is number of half lives = t / T = 3
By using the decay law of radioactivity
N / N0 = (1 / 2)^n
where, N0 be the initial amount
N be the amount left
n be the number of half lives
N / 36 = (1/2)^3
N / 36 = 1 / 8
N = 36 / 8 = 4.5 g
