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PRACTICE EXERCISES 5: Tell me whether on the following numbers if the elements that is given here is STABLE OR UNSTABLE ISOTOPES. (2 PTS. EACH) 1. HYDROGEN 2. OXYGEN 3. NEON 4. RADIUM 5. RADON 6. PROMETHIUM 7. THORIUM 8. BORON 9. FRANCIUM 10. EINSTENIUM​

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