Question

Uranium-238 has a half-life of 4.5 billion years. Given that scientists estimate Earth's age to be 4.6 billion years, what is the most likely percentage of parent to daughter isotopes of this element currently existing on Earth?

A. 10 percent
B. 25 percent
C. 50 percent
D. 75 percent

Answer 1

You forgot to medal me for your last question

Answer 2

Oops sorry~

Answer 3

Well, I cannot help you anymore. Goodluck

Answer 4

Alright thanks

Answer 5

@StudyGurl14 can you help me?

Answer 6

50% I believe

Answer 7

half life is saying that once 4.5 billion years pass, 50% of it would have decayed. So it would have only went through 1 half life. so 50% is gone

Answer 8

Ohh~ I get it now thanks c: