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並前往https://www.laurel.k12.ky.us/userfiles/538/Classes/17838/calculating%20subatomic%20particles.pdf

Hyphen Notation • The element name or symbol followed with a

The element name or symbol followed with a hyphen and the mass number. • Examples. • Carbon-14 or C-14 (meaning the isotope of carbon that has a mass number ...

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