Assume that a substance contains a parent isotope with a half-life of 600
years. The parent-daughter ratio is
6.25% parent isotope to 93.75%
daughter isotope. Calculate the age
of this substance

Amethod of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.

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Ansa new gas is observed in the form of bubbles;