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- Fluorine (8588 bytes)
55: ...e-18, a radioactive isotope that emits [[positron|positrons]], is often used in [[positron emission tomograph... - Titanium (20884 bytes)
- Electron (10516 bytes)
66: ... refer to both negatrons and '''[[positron]]s'''. Positrons have the same mass and an electric charge of the ...
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