hiili12atomin

Hiili12atomin refers to the isotope of carbon with a mass number of 12. The atomic symbol for carbon is C, and the number 12 indicates the total number of protons and neutrons in its nucleus. Specifically, carbon-12 has 6 protons and 6 neutrons. This isotope is the most abundant form of carbon found on Earth, making up over 98.9% of all carbon atoms.

Carbon-12 is the standard against which atomic masses are measured. The unified atomic mass unit (u) is defined as one-twelfth the mass of an unbound neutral atom of carbon-12. This definition makes carbon-12 a fundamental reference point in chemistry and physics for determining the masses of other atoms and molecules.

Unlike some other carbon isotopes, such as carbon-14, carbon-12 is stable and does not undergo radioactive decay. Its stability and abundance have made it crucial for various scientific applications, including mass spectrometry and the calibration of scientific instruments. The consistent properties of carbon-12 ensure reliable measurements and comparisons across different experiments and laboratories.