Use of radioactive decay of 176 Lu to 176 Hf , estimate the formation of Earth’s crust 4.3 billion years ago is given. Utilization of ratio of 176 Lu to 176 Hf , date very old rocks is to be stated. Concept introduction: Radioactive dating is an important method for determining the age of old rocks. It involves comparing the abundance ratio of a radioactive isotope with a reference isotope. To determine: The decay constant, K and the ratio of 176 Lu to 176 Hf .

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Chapter 19, Problem 8Q

Interpretation Introduction

Interpretation: Use of radioactive decay of 176Lu to 176Hf , estimate the formation of Earth’s crust 4.3 billion years ago is given. Utilization of ratio of 176Lu to 176Hf , date very old rocks is to be stated.

Concept introduction: Radioactive dating is an important method for determining the age of old rocks. It involves comparing the abundance ratio of a radioactive isotope with a reference isotope.

To determine: The decay constant, K and the ratio of 176Lu to 176Hf .

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