Do scientists use radioactive dating
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he generally accepted age for the Earth and the rest of the solar system is about 4.55 billion years (plus or minus about 1%).
If there are too many or too few neutrons, the atom is unstable, and it sheds particles until its nucleus reaches a stable state.
Think of the nucleus as a pyramid of building blocks.
The half-life of the isotope being measured determines how useful it is at dating very old samples.
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This value is derived from several different lines of evidence.