Explainer: The difference between radiation and radioactivity
Atoms of the same chemical can have different numbers of neutrons. Some 99% of carbon atoms have six neutrons, when added to the six protons this gives an atomic mass of 12. Some carbon atoms ... An atom contains as many electrons as protons.
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 ...
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 ...
Some conifers grow faster, providing more impact sooner. The Environmental Protection Agency has calculated the amount of carbon dioxide emitted by the average car as of 2007 at about five metric tons, more than 11,000 pounds, so a single acre of woodlot ...
Elemental shift: Periodic table gets weight changes
Instead, they are updating what are often thought of as constants of nature 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 ...