Elemental Shift: Periodic Table Gets Weight Changes
A picture of how the revised entry for carbon will look on the periodic table ... carbon has two — carbon-12 and carbon-13. (The numbers in each isotope reveal how many particles they have in their nuclei — carbon-12 has six protons and six neutrons.)
A date with carbon
There's plenty of hydrogen, oxygen and nitrogen in living things too, but carbon's got something none of them do — a radioactive ... in a sample to decay. Carbon-14 has a half-life of 5,730 years. That means that no matter how many carbon-14 atoms ...
Explainer: what is an isotope?
You can think of protons and ... ability some isotopes have has to do with the fact not all isotopes are stable, and is what led Frederick Soddy to his Nobel Prize-winning discovery of isotopes in 1913. Some isotopes - such as carbon-12 - will happily ...
Massive Star Explosion Seeded the Early Solar System, Meteorite Study Suggests
The explosive death of a star seeded matter into the solar system soon after ... that differ in how many neutrons they possess in their atomic nuclei; carbon-12 has six neutrons, while carbon-13 has seven. (Both have six protons.) Brennecka and his ...
Explainer: what is radiocarbon dating and how does it work?
Therefore, if we know the 14 C: 12 C ratio at the time of death and the ratio today, we can calculate how much time has ... of radiocarbon dating a product’s decay was measured, but this required huge samples (e.g. half a human femur). Many labs now ...