When it decays it forms thorium-234 which is also unstable.Finally, after a series of radioactive isotopes are formed it becomes lead-206, which is stable.When an organism, eg a tree, dies it stops taking in carbon dioxide.The amount of carbon-14 in the wood decreases with time as it decays into nitrogen with a half-life of about 5700 years.That causes a dating problem with any animal that eats seafood. After about ten half-lives, there's very little C14 left.
Carbon-14 dating has been used successfully on the Dead Sea Scrolls, Minoan ruins and tombs of the pharaohs among other things. The half-life of carbon-14 is approximately 5,730 years. dinosaurs the evolution alleges lived millions of years ago.The imprint of a leaf was also discovered within the basalt, which was also regarded as remarkable, remembering that the enclosing rock was once molten lava erupted at 1000–1200°C (about 1800–2200°F).So how could these tree trunks have survived being engulfed by molten lava?The amount of carbon-14 in the atmosphere has not changed in thousands of years.Even though it decays into nitrogen, new carbon-14 is always being formed when cosmic rays hit atoms high in the atmosphere.