- #1
thiev
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1. Homework Statement
The relative abundance of uranium isotopes in today’s Earth crustal material is:
99.2745% 238U
0.7196% 235U
0.0055% 234U
What were the relative abundances when the Earth was formed 4.6x109 years ago?
2. Homework Equations
t = age = 1/lambda * ln(N/No)
N = No*e^lambda*t
3. The Attempt at a Solution
i don't know how to approch this...
The relative abundance of uranium isotopes in today’s Earth crustal material is:
99.2745% 238U
0.7196% 235U
0.0055% 234U
What were the relative abundances when the Earth was formed 4.6x109 years ago?
2. Homework Equations
t = age = 1/lambda * ln(N/No)
N = No*e^lambda*t
3. The Attempt at a Solution
i don't know how to approch this...