1. Hypothetical solid Astatine may …

2. What does Astatine mean? Information and translations of Astatine in the most comprehensive dictionary definitions …

3. In compounds of Astatine (where known), the most common oxidation numbers of Astatine are: 1, and -1

4. Astatine Please visit the Astatine element page for information specific to the chemical element of the periodic table.

5. Electron Affinity and Electronegativity of Astatine

6. The Astatine atomic number is 85

7. Definition of Astatine in the Definitions.net dictionary

8. The chemical symbol for Astatine is At.

9. Electronegativity of Astatine is 2.2

10. 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

11. The chemical symbol for Astatine is At

12. Hence, Astatine, particularly its isotope Astatine-211, is an attractive candidate for a form of radiation therapy for cancer treatment, called

13. Electron Affinity of Astatine is 270.1 kJ/mol

14. Astatine was first produced by bombarding bismuth-209 with energetic alpha particles, and this is still the major route used to create the relatively long-lived isotopes astatine-209 through astatine-211.

15. Astatine is the heaviest member of the halogen family

16. Astatine definition, a rare element of the halogen family

17. Astatine is produced by bombarding bismuth with alpha particles.

18. Astatine is a Block P, Group 17, Period 6 element

19. Astatine is the rarest naturally occurring element on the Earth’s crust

20. All isotopes of Astatine are radioactive and decay into other elements.

21. Astatine is the rarest naturally occurring element on the Earth’s crust

22. Astatine is an element in the periodic table with atomic no

23. The isotopes of Astatine have a short life of …

24. Neither the most stable isotope astatine-210, nor the medically useful astatine-211, occur naturally; they can only be produced synthetically, usually by bombarding bismuth-209 with alpha particles.

25. Astatine is a halogen and possibly accumulates in the thyroid like iodine

26. Astatine was first produced by bombarding bismuth with alpha particles, and it …

27. Astatine is one of the least abundant elements on Earth

28. The final product of the decay of Astatine is an isotope of lead

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

30. Astatine is the 85th element of the periodic table with a symbol ‘At’

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

32. This sample of uranite contains a vanishingly small amount of Astatine

33. Only about .05 micrograms of Astatine have been produced so far.

34. 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.

35. It turns out that Astatine, a halogen and nonmetal element with the atomic number 85, is one of the rarest elements found on Earth.The amount of naturally present Astatine, about 25 grams at any

36. Our Astatine page has over 105 facts that span 41 different quantities

37. Astatine is pronounced as AS-teh-teen or as AS-teh-ten.

38. It wasn't until three years later, however, that Astatine was found in nature

39. Their work concentrated on the rare radionuclides: astatine-211, bismuth-213 and actinium-225.

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

41. Astatine is a member of the halogen family, elements in Group 17 (VIIA) of the periodic table

42. 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

43. It is estimated that the entire Earth’s crust contains only about 30 grams of Astatine.

44. Astatine was discovered in 1940 by Dale Corson, Kenneth McKenzie, and Emilio Segre at Berkley

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

46. If you could ever isolate enough of this stuff Astatine would be an even darker purple solid than iodine.

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

48. 77 rows  · Astatine is a chemical element with symbol At and atomic number 85. Classified as a …

49. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure.

50. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure

51. There is less than one ounce of Astatine in the entire earth's crust and exists as a result of uranium and thorium decay

52. Astatine is almost non-existent on the Earth, and is found only in extremely minute quantities near uranium and thorium minerals

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

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

55. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure

56. Astatine-211 can be produced in reasonable yield from natural bismuth targets via the (209)Bi(α,2n)(211)At nuclear reaction utilizing straightforward methods

57. Realizing Clinical Trials with Astatine-211: The Chemistry Infrastructure Sture Lindegren, Per Albertsson, Tom Bäck, Holger Jensen, Stig Palm & Emma Aneheim Cancer Biotherapy and

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

59. Astatine is the rarest naturally-occurring element, with the total amount in Earth's crust estimated to be less than 1 oz (28 g) at any given time; this amounts to …

60. 85 and atomic mass 210 grams per mol. Some of the physical properties of Astatine are based on the appearances of the other halogen group elements

61. Instead of searching for the element in nature, the scientists created it by bombarding bismuth-209 with alpha particles in a cyclotron (particle accelerator) to produce, after emission of two neutrons, astatine-211.

62. Astatine is the least reactive of the halogens but just like the rest of them it combines with hydrogen to make hydrogen astatide which dissolves in water to make hydroastatic acid; it is just like a weaker version of hydrochloric acid

63. Astatine can be found in uranium and thorium minerals as part of the natural decay series, however, the total amount present at any point in time in the entire earth's crust is estimated to be less than 30 grams.

64. 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

65. 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

66. The number of electrons in each of Astatine's shells is 2, 8, 18, 32, 18, 7 and its electron configuration is [Xe] 4f 14 5d 10 6s 2 6p 5.The Astatine atom has a covalent radius of 150.pm and it's Van der Waals radius is 202.pm.

67. Astatine-211, a heavier congener of iodine that emits α particles at energies lethal to cells, has attracted interest in recent years as a therapeutic tool, but has the drawback that direct labeling of proteins with this element forms weak At C bonds that are subject to cleavage under clinical conditions