Radioactive Elements

Here's a definition of radioactive elements and as well as the list of common radioactive elements.

1. Common Radioactive Elements

2. Radioactive elements are elements that have an unstable nucleus. When the nuclei are considered unstable they radiate alpha, beta, and gamma radiation and is converted into a stable element. Elements are considered radioactive if they are either artificially made or have no stable isotopes.

3. Luminous watch X-ray Uranium glass/ Vaseline glass Smoke detector Ceramics Glass lantern mantle

4. HYDROGEN (H) Atomic number 1 Atomic mass number 3 Decay type Beta Decay ( β - ) Half life 12 years

5. RADIUM (Ra) Atomic number 88 Atomic mass number 225 Decay type Beta Decay ( β - ) Half life 15 days

6. Radium (Ra) Atomic number 88 Atomic mass number 224 Decay type Alpha Half life 4 days

7. Uranium (U) Radioactive element Atomic number Atomic mass number Decay type Half life Uranium (U) 92 233 Alpha 162,000 years Uranium (U) 92 234 Alpha 248,000 years Uranium (U) 92 235 Alpha 713 million years Uranium (U) 92 236 Alpha 23.9 million years Uranium (U) 92 238 Alpha 4.51 billion years

8. Polonium (Po) Atomic number 84 Atomic mass number 210 Decay type Alpha Half life 138 days

9. Carbon (C) Atomic number 6 Atomic mass number 14 Decay type Beta Decay ( β - ) Half life 5,730 years

10. Technetium ( Tc ) Atomic number 43 Atomic mass number 99 Decay type Beta Decay ( β - ), Gamma Half life 210,000 years

11. Iodine (I) Radioactive element Atomic number Atomic mass number Decay type Half life Iodine (I) 53 129 Beta Decay ( β - ), Gamma 17.2 million years Iodine (I)v 53 131 Beta Decay ( β - ), Gamma 8 days Iodine (I) 53 134 Beta Decay ( β - ), Gamma 52 minutes

12. Lead ( Pb ) Atomic number 82 Atomic mass number 210 Decay type Beta Decay ( β - ), Gamma Half life 21 years

13. Cesium (Cs ) 134 & 137 Atomic number 55 Atomic mass number 134, 137 Decay type Beta Decay ( β - ), Gamma Half life 2 years, 30 years

14. Plutonium ( Pu ) 239 Atomic number 94 Atomic mass number 239 Decay type Alpha Half life 24,390 years

15. REPORTED BY: GROUP 4