- #1

Natalie

**[SOLVED] Half Life**

I can't get the answer to this question.

If Hydrogen 3 ( 3H )

( 1 )

has a half life of 12.5a, how many years have passed when only 1/64 of its original mass remains?

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter Natalie
- Start date

- #1

Natalie

I can't get the answer to this question.

If Hydrogen 3 ( 3H )

( 1 )

has a half life of 12.5a, how many years have passed when only 1/64 of its original mass remains?

- #2

russ_watters

Mentor

- 21,024

- 7,729

Half life is a pretty simple thing, you can count this one on your fingers. 1 half life is 1/2, 2 half lives is 1/4, 3 is 1/8, 4 is 1/16, 5 is 1/32, and 6 is 1/64.

But I don't know what "12.5a" means.

Share: