1. Californium is a man-made radioactive metal

2. Actinium is a radioactive element.

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

4. 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

26. Americium-241 July 2002 What is Americium-241? Americium is a man-made radioactive metal that exists as a solid under normal conditions

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

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

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

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

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

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

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

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

35. 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

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

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

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

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

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

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

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

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

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

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

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

47. Radioactive waste is waste that contains radioactive material.

48. Copernicium is a lab-made chemical element, also synthetic

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

50. 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

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

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

53. Man-made fibres: polyester, acrylic....)

54. It's a man-made lake.

55. Biopolymers versus man-made polymers Biopolymers are made from biomass

56. - other synthetic man-made staple fibres,

57. But Chimeras aren't always man-made

58. It's made out of rocks, man.

59. 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

60. synthetic man-made staple fibres of polyester

61. synthetic man-made staple fibres of polyimide

62. - synthetic man-made staple fibres of polypropylene,

63. Harbours can be man-made or natural.

64. They are not empty man-made promises.

65. Absurdity of man-made idols (9-20)

66. synthetic man-made staple fibres of polyamide

67. He killed a man and made away.

68. Sewing thread of man-made staple fibres

69. Do man-made chemicals affect our fertility?

70. Woven fabrics of man-made staple fibres:

71. No man-made drug could do that.

72. This hole looks radioactive.

73. Actinium is dangerously radioactive

74. Channel: an open man-made passageway for water.

75. And you've made me the happiest man alive.

76. The man made a statement to the police.

77. What purpose would a man-made religion serve?

78. Canals were man-made rivers which were deep …

79. Aqueduct: an open man-made passageway for water.

80. Canal: an open man-made passageway for water.