Respuesta :
Answer:
17,190 years
Explanation:
Half life = 5,730 years
Initial amount = 4.2 picograms
Present amount = About 0.5 picograms
Number of half lives = ?
Before proceeding;
The half life a material is simply the amount of time it takes for half of that material to decay.
4.2 --> 2.1 (First Half life)
2.1 --> 1.05 (Second Half life)
1.05 --> 0.525 (Third Half life)
It takes three half lives to reach it's present mass. This means number of years passed = 3 x 5,730 years = 17,190 years
The number of half lives will be :17,190 years
Given:
Half life = 5,730 years
Initial amount = 4.2 picograms
Present amount = About 0.5 picograms
To find:
Number of half lives = ?
What does half-life tell?
The half life a material is simply the amount of time it takes for half of that material to decay.
4.2 --> 2.1 (First Half life)
2.1 --> 1.05 (Second Half life)
1.05 --> 0.525 (Third Half life)
It takes three half lives to reach it's present mass. This means number of years passed = 3 * 5,730 years = 17,190 years
Find more information about half life here:
brainly.com/question/2320811
