Question

Question 4 of 20

4 Points
A radioactive element has a half-life of 3,000 years. If a sample of this
element begins with a mass of 60 grams, how long would you have to wait for
the mass to decrease to 15 grams?
O
A. 6,000 years
O
B. 12,000 years
O
O
C. 3,000 years
D. 1,500 years
BH​

Answer 1

6,000

Step-by-step explanation:

Answer 2

A. 6,000 years

Step-by-step explanation:

Original sample N = 60 g

The half life of N/2 is 3000yrs

"""""""""""""""""""N/4 is 6000yrs

N/4 ===> 15 gram

it takes 6000yrs to decrease to 15grams