Question

Thorium-230 is a radioactive isotope that has a half life of 75,383 years. If the initial sample contains 585 g:
(A) Find the decay rate of Thorium-230.
(B) Find how long it will take 66% of the sample to decay.

(A) Decay rate: -0.00000925500617 (B) 104976.6 years

(A) Decay rate: -0.00000919500657 (B) 117325.7 years

(A) Decay rate: -0.00000824164765 (B) 58461.9 years

(A) Decay rate: -0.00000919500657 (B) 45189.3 years

Answer 1

do you have an equation for the decay...?

Answer 2

no

Answer 3

do you know it

Answer 4

I think we need to start with the halflife formula

Answer 5

the equation...
let me write it

Answer 6

ok