Certain chemical elements have more than one type of atom. Different atoms of the same element are called isotopes. Carbon has three main isotopes. They are carbon-12, carbon-13 and carbon-14.

When cosmic rays reach Earth’s upper atmosphere, physical and chemical interactions form the radioactive isotope ... of dating carbon decay,” said David Mazziotti, a UChicago professor in chemistry.

For example, most carbon (≈ 99 %) has 6 protons and 6 neutrons and ... produces variation in the stable isotope ratio of different element pools and b) establishes an isotope signal that can indicate ...

Stable isotopes are alternative forms of elements with different molecular weights that are found naturally and do not decay radioactively. Stable isotope analysis of elements such as carbon ...

Because the mix of carbon isotopes bonding to each fluorine atom ... worked out so well is because we're assembling tools from different areas of science [chemistry and geosciences] that don ...

Carbon, a building block of life, is constantly moving through different environmental compartments such ... and indirectly using naturally-occurring isotopes of thorium and polonium. These ...

Different environments are often characterized ... Linking winter and summer events in a migratory bird using stable carbon isotopes. Science 282, 1884-1886 (1998). Minami, H.

The Thermo 253+ dual inlet mass spectrometer is specially designed to measure different masses of carbon dioxide at very high precision. This measurement provides carbon, oxygen and “clumped” isotope ...

A research team led by Prof. Shen Yan'an from the University of Science and Technology of China (USTC) has made significant ...