Which allowed scientists to determine that Earth was at least 4.3 billion years old?(1 point)

Responses

chemical reactivity of zircon ions
chemical reactivity of zircon ions

magnetic field surrounding zircon
magnetic field surrounding zircon

the radioactive decay of uranium to lead
the radioactive decay of uranium to lead

the electrical conductivity of uranium ions

1 answer

The correct response is:

the radioactive decay of uranium to lead