2025年2月20日 · Carbon-14, the longest-lived radioactive isotope of carbon, whose decay allows the accurate dating of archaeological artifacts from 500 to 50,000 years old. Carbon-14 has a half-life of 5,730 years.

2023年10月20日 · Carbon-14 dating works by comparing the ratio of carbon-12 to carbon-14 in a sample to that in a living organism, allowing for the determination of the age of formerly living things fairly precisely.

2025年1月29日 · Carbon-14 dating, method of age determination that depends upon the decay to nitrogen of radiocarbon (carbon-14). Carbon-14 is continually formed in nature by the interaction of neutrons with nitrogen-14 in the Earth’s atmosphere.

Radiocarbon dating, or carbon-14 dating, is a scientific method that can accurately determine the age of organic materials as old as approximately 60,000 years. First developed in the late 1940s at the University of Chicago by Willard Libby, the technique is …

2025年1月29日 · Carbon dating, also known as radiocarbon dating or carbon-14 dating, is a method of determining the age of organic materials by measuring the amount of carbon-14 (14 C) present in a sample. It is widely used in archaeology, geology, and environmental science to date objects up to around 50,000 years old.

Carbon-14 is a radioisotope of the chemical element carbon, which has 8 neutrons in its atomic nucleus in addition to the element-specific 6 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 14.

Carbon-14 is a radioactive isotope of carbon that is formed naturally in the upper atmosphere by cosmic rays and can replace carbon-12 in biological systems. You might find these chapters and articles relevant to this topic. Paul K. Andersen, ... Majid Ghassemi.

2023年1月30日 · Radiocarbon dating (usually referred to simply as carbon-14 dating) is a radiometric dating method. It uses the naturally occurring radioisotope carbon-14 (14C) to estimate the age of carbon-bearing materials up to about 58,000 to 62,000 years old. Carbon has two stable, nonradioactive isotopes: carbon-12 (12C) and carbon-13 (13C).

Carbon-14, symbolised as 14 C, is a naturally occurring radioactive isotope of carbon. Unlike the more common carbon-12, carbon-14 contains two additional neutrons, giving it unique properties. It is unstable, decaying over time to nitrogen-14 through beta decay.

2021年10月14日 · Carbon C-14 | CH4 | CID 26873 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more.