Question

1. radiometric dating is a scientific technique used to determine the age of artifacts and cultural materials based on the decay of radioactive____ within them. isotopes chemicals cells water

Explanation:

Radiometric dating relies on the decay of radioactive isotopes to determine the age of materials. Isotopes are atoms of the same element with different numbers of neutrons, and some are radioactive and decay at a known rate. Chemicals is too general, cells are related to living organisms and not the basis of radiometric dating, and water is not what radiometric dating is based on.

Answer:

A. isotopes