1. Actinium is a radioactive element.

2. Actinium Ac89, Actinoid element: 锕 [a1] americium Am95, Actinoid element: 镅 [mei2] astatine At, radioactive halogen (or metalloid), atomic number 85: 砹 [ai4] berkelium Bk97, Actinoid element: 錇 [pei2] berkelium Bk97, Actinoid element: 锫 [pei2] californium Cf98, radioactive Actinoid element: 鐦 [kai1] californium Cf98, radioactive

3. Copernicium a Chemical Element atomic number 112 Cn symbol metal radioactive synthetic element that

4. Americium is a radioactive metallic element with atomic number 95 and element symbol Am

5. Californium is a radioactive element first synthesized by Stanley G

6. Copernicium definition: a highly radioactive element that is produced synthetically

7. Copernicium definition: a highly radioactive element that is produced synthetically

8. Polonium is a radioactive element that exists in two metallic allotropes.

9. Astatine is a radioactive chemical element that has the symbol At

10. Actinon (ăk`tənŏn'): see radonradon , gaseous radioactive chemical element; symbol Rn; at

11. Copernicium definition, a superheavy, synthetic, radioactive element with a very short half-life

12. Astatine is a highly radioactive element and it is the heaviest known halogen

13. Berkelium is a transuranic radioactive chemical element with symbol Bk and atomic number 97

14. Americium is a radioactive transuranic chemical element with symbol Am and atomic number 95

15. Californium is a radioactive metallic chemical element with symbol Cf and atomic number 98

16. Curium is a transuranic radioactive chemical element with symbol Cm and atomic number 96

17. Properties of Copernicium Copernicium is a radioactive, synthetic element about which little is known

18. Berkelium is a transuranic radioactive chemical element with symbol Bk and atomic number 97

19. What is Berkelium? It is a radioactive chemical element with the atomic number 97

20. Actinium is a radioactive element with an atomic number 89 of the periodic table

21. Copernicium definition is - a short-lived artificially produced radioactive element that has 112 protons.

22. Each element has at least one isotope with unstable nuclei that can undergo radioactive decay.

23. A chemical element that is radioactive and is the rarest natural element on the Earth's surface: The properties of Astatine remain a mystery.

24. Curium is a synthetic radioactive element whose main use is in batteries in very special applications

25. Americium definition is - a radioactive metallic element produced artificially by bombarding plutonium with high-energy neutrons.

26. Actinium (Ac), radioactive chemical element, in Group 3 (IIIb) of the periodic table, atomic number 89.

27. Berkelium is a radioactive metallic element that is a member of the actinide group of elements

28. Soon after, Marie Sklodowska-Curie made the crucial discovery and isolation of radium, a radioactive element.

29. "Copernicium is an extremely radioactive chemical element and can only be created in a laboratory

30. Berkelium definition is - a radioactive metallic element produced artificially (as by bombarding americium 241 with alpha particles).

31. Astatine is a very rare radioactive chemical element with the chemical symbol At and atomic number 85

32. Astatine is a radioactive element with symbol At and atomic number 85. It has the distinction of being the rarest natural element found in the Earth's crust, as it is only produced from radioactive decay of even heavier elements

33. Californium is another radioactive element, used primarily in research and in instruments employed in the petroleum industry

34. Actinium is a radioactive metal. It is the third element in row 7 of the periodic table

35. The radioactive inflammable materials contacting the conductive heating element are burnt, and radio-active non-inflammable materials melted.

36. Astatine is a highly radioactive element and the heaviest member of halogen family. It was discovered in 1940.

37. Americium metal is highly radioactive, is the fourth synthetic element discovered in the late 1944 from Glenn Seaborg

38. It is a radioactive metallic element and an actinide.Berkelium was invented by scientists and does not exist in nature

39. (symbol Ac) a chemical element that is a soft, silver-white metal and is radioactive: Researchers are testing the Actinium.

40. This made it possible for the Curies to separate out the radioactive compounds and discover a new element in them.

41. What does Astatine mean? A highly unstable radioactive element, the heaviest of the halogen group, that resembles iodine in solution

42. (symbol Ac) a chemical element that is a soft, silver-white metal and is radioactive: Researchers are testing the Actinium.

43. Astatine (At), radioactive chemical element and the heaviest member of the halogen elements, or Group 17 (VIIa) of the periodic table.

44. What is Berkelium? Origin / Meaning of the name Berkelium Berkelium is a synthetic radioactive element and was named after Berkeley, California

45. Radioactive waste is waste that contains radioactive material.

46. Nitrogen-14 is one of two stable (non-radioactive) isotopes of the chemical element nitrogen, which makes about 99.636% of natural nitrogen.

47. Definition of Astatine : a radioactive halogen element discovered by bombarding bismuth with alpha particles and also formed by radioactive decay — see Chemical Elements Table First Known Use of Astatine 1947, in the meaning defined above

48. Astatine definition: a radioactive element of the halogen series: a decay product of uranium and thorium that Meaning, pronunciation, translations and examples

49. This law states that the number of atoms of a radioactive element is halved after a given amount of time has elapsed.

50. Curium definition, a radioactive element not found in nature but discovered in 1944 among the products of plutonium after bombardment by high-energy helium ions

51. This hole looks radioactive.

52. Actinium is dangerously radioactive

53. Copernicium, (abbreviated Cn), which is an artificially produced, radioactive element with 112 protons in its nucleus that was named after Nicolaus Copernicus, a European scientist who lived from

54. Since Astatine is usually only found as a state of another heavier element in the process of radioactive decay, Astatine is one of the rarest elements on Earth.

55. Nevertheless, all Actinides are radioactive.

56. Ted, you're radioactive by nature.

57. Radioactive Contamination occurs when radioactive material is deposited on or in an object or a person

58. Actinium is commonly for radioactive research as it has many radioactive elements resulted from uranium residue

59. Actinium is a radioactive chemical element with symbol Ac (not to be confused with the abbreviation for an acetyl group) and atomic number 89, which was discovered in 1899.

60. Copernicium is a highly radioactive metal

61. 10 Uranium is a radioactive material.

62. All isotopes of Berkelium are radioactive

63. Measure the activity of radioactive materials.

64. Radioactive Fallout—A Matter of Concern

65. Radium and uranium are radioactive elements.

66. One becquerel is that quantity of a radioactive element in which there is one atomic disintegration per second; one curie is that quantity in which there are 3.7 × 10 …

67. Dehumidifying element, and adsorbing element used for the dehumidifying element

68. 1.1 Radioactive fallout is nearly always transboundary.

69. 8 Radioactive waste is simply spent fuel.

70. It's a radioactive catastrophe waiting to happen.

71. Antimatter is also produced by radioactive decay.

72. Adsorber element, ring filter element

73. 31 Radioactive Fallout—A Matter of Concern

74. 14 Radium and uranium are radioactive elements.

75. Curium is a radioactive rare earth metal

76. Californium is a man-made radioactive metal

77. Radioactive sludge was channelled into large basins.

78. Radioactive water had seeped into underground reservoirs.

79. Element.Absolutize(element) → Element Turns element into an absolutely-positioned element without changing its position in the page layout.

80. Astatine is a highly radioactive element: its most stable isotope, Astatine-210, has a half-life of 8.1 hours If you were to sell Astatine, and you had a pound of it