please help A fossil is found to have a Clevel of 72.0% compared to living organisms....

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A fossil is found to have a Clevel of 72.0% compared to living organisms. How old is the fossil? age: years

How many neutrons are needed to initiate the fission reaction? 230 + ? 1.Sr + 4 Xe + 3n number of neutrons:

Resources 18 decays by positron emission, Balance the nuclear equation by giving the mass number, atomic number, and element

Balance this nuclear reaction by supplying the missing nucleus. Replace each question mark with an appropriate integer or sym

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