Answer: ISOTOPES

Possible questions:


Some atoms we know 3 Answers
Dating material we know 4 Answers
Uranium has many we know 1 Answer
They may be radioactive we know 1 Answer
Some are radioactive we know 1 Answer
Chemical variants we know 1 Answer
U-235 and U-238 e.g. we know 1 Answer
U-235 and U-238 we know 1 Answer
U 235 et al. we know 1 Answer
Springfield minor leaguers we know 1 Answer
Protium and tritium, e.g. we know 1 Answer
Elemental relatives we know 1 Answer
Deuterium and tritium we know 1 Answer
Chemist's relatives? we know 1 Answer
Carbon 14 and uranium 235 we know 1 Answer
Carbon 14 and others we know 1 Answer
Carbon 12 and carbon 14 we know 1 Answer

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