Aktinyo

Actinium, ₈₉Ac
Actinium
Bigkas	/ækˈtɪniəm/ (ak-TIN-ee-əm)
Appearance	silvery-white, glowing with an eerie blue light; sometimes with a golden cast
Bilang na pangmasa	[227]
Actinium sa talahanayang peryodiko
	radium ← actinium → thorium
Atomikong bilang (Z)	89
Group	n/a
Period	7
Block	f-block
Electron configuration	[Rn] 6d1 7s2
Electrons per shell	2, 8, 18, 32, 18, 9, 2
Physical properties
Phase at STP	solido
Melting point	1500 K (1227 °C, 2240 °F) (estimated)
Boiling point	3500±300 K (3200±300 °C, 5800±500 °F) (extrapolated)
Density (near r.t.)	10 g/cm3
Heat of fusion	14 kJ/mol
Heat of vaporization	400 kJ/mol
Molar heat capacity	27.2 J/(mol·K)
Atomic properties
Oxidation states	+2, +3 (isang matapang na panimulang oksido)
Electronegativity	Pauling scale: 1.1
Ionization energies	1st: 499 kJ/mol ; 2nd: 1170 kJ/mol ; 3rd: 1900 kJ/mol ; (more) ;
Covalent radius	215 pm
	Mga linyang espektral ng actinium
Other properties
Natural occurrence	mula sa pagkabulok
Crystal structure	face-centered cubic (fcc) (cF4)
Lattice constant	a = 531.5 pm (at 20 °C)
Thermal conductivity	12 W/(m⋅K)
CAS Number	7440-34-8
History
Discovery and first isolation	Friedrich Oskar Giesel (1902, 1903)
Named by	André-Louis Debierne (1899)
Isotopes of actinium t; b;
CD	211Bi
ε	226Ra
α	222Fr
α	223Fr
	Kategorya: Actinium; tingnan; usapan; baguhin; \| references

Ang actinium o aktinyo (Espanyol: actinio, may sagisag na Ac) ay isang radyoaktibong elementong matatagpuan sa mga inang-bato ng uranyo, at pinanggagalingan ng mga sinag-alpa. Mayroon itong atomikong bilang na 89. Natuklasan ito noong 1899 ni André-Louis Debierne.^[5] Ito ang unang elementong hindi primordiyal na elementong radyoaktibo na unang naibukod o naihiwalay, bagaman napansin din noong dati pa ang polonyo, radyum, at radon, subalit hindi naibukod hanggang sa sumapit ang 1902. Ito ang pinakamatagal na istopo (Ac 227). Mayroon itong kalahating-buhay na 21.7 mga taon. Kabilang sa mga katangian nito ang punto ng pagkatunaw (MP o melting point) na 1,050 °C, punto ng pagkulo (BP o boiling point) na 3,200 °C, espesipikong grabidad (SG o specific gravity) na humigit-kumulang sa 10.07, at V na 3.^[5] Ito ang elementong nagbigay ng pangalan sa seryeng aktinido^{[t 1]}, na isang pangkat ng 15 katulad na mga elementong nasa pagitan ng aktinyo at ng lawrencium sa talaang peryodiko.

Talababa

↑ Espanyol: actinido, Ingles: actinide

Mga sanggunian

↑ Wall, Greg (8 September 2003). "C&EN: It's Elemental: The Periodic Table - Actinium". C&EN: It's Elemental: The Periodic Table. Chemical and Engineering News. Nakuha noong 2 June 2011.
1 2 3 Kirby, Harold W.; Morss, Lester R. (2006). "Actinium". The Chemistry of the Actinide and Transactinide Elements. p. 18. doi:10.1007/1-4020-3598-5_2. ISBN 978-1-4020-3555-5.
↑ Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9.
↑ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
1 2 Gaboy, Luciano L. Actinium, aktinyo - Gabby's Dictionary: Praktikal na Talahuluganang Ingles-Filipino ni Gabby/Gabby's Practical English-Filipino Dictionary, GabbyDictionary.com.

[6] Espanyol: actinido, Ingles: actinide

[1] Wall, Greg (8 September 2003). "C&EN: It's Elemental: The Periodic Table - Actinium". C&EN: It's Elemental: The Periodic Table. Chemical and Engineering News. Nakuha noong 2 June 2011.

[Kirby-2] 1 2 3 Kirby, Harold W.; Morss, Lester R. (2006). "Actinium". The Chemistry of the Actinide and Transactinide Elements. p. 18. doi:10.1007/1-4020-3598-5_2. ISBN 978-1-4020-3555-5.

[Arblaster_2018-3] Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9.

[NUBASE2020-4] Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.

[Gaboy-5] 1 2 Gaboy, Luciano L. Actinium, aktinyo - Gabby's Dictionary: Praktikal na Talahuluganang Ingles-Filipino ni Gabby/Gabby's Practical English-Filipino Dictionary, GabbyDictionary.com.

[1]

[2]

[3]

[4]

[5]

[t 1]