Actinyo

Gikan sa Wikipedia, ang gawasnong ensiklopedya
Actinium
89Ac
La

Ac

(Uqu)
radiumactiniumthorium
Appearance
silvery-white
General properties
Name, simbolo, kaiphan actinium, Ac, 89
Pronunciation Plantilya:IPAc-en
Plantilya:Respell
Element category aktinido
sometimes considered a transition metal
Group, period, block 37, f
Standard atomic weight (227)
Electron configuration [Rn] 6d1 7s2
2, 8, 18, 32, 18, 9, 2
Electron shells of actinium (2, 8, 18, 32, 18, 9, 2)
History
Discovery André-Louis Debierne (1899)
First isolation André-Louis Debierne (1899)
Physical properties
Phase magahi
Density (near r.t.) 10 g·cm−3
Melting point (circa) 1323 K, 1050 °C, 1922 °F
Boiling point 3471 K, 3198 °C, 5788 °F
Heat of fusion 14 kJ·mol−1
Heat of vaporization 400 kJ·mol−1
Molar heat capacity 27.2 J·mol−1·K−1
Atomic properties
Oxidation states 3
(neutral oxide)
Electronegativity 1.1 (Pauling scale)
Ionization energies 1st: 499 kJ·mol−1
2nd: 1170 kJ·mol−1
Covalent radius 215 pm
Miscellanea
Crystal structure face-centered cubic
Actinium has a face-centered cubic crystal structure
Magnetic ordering no data
Thermal conductivity 12 W·m−1·K−1
CAS registry number 7440-34-8
Most stable isotopes
Main article: Isotopes of actinium
iso NA half-life DM DE (MeV) DP
225Ac trace 10 d α 5.935 221Fr
226Ac syn 29.37 h β 1.117 226Th
ε 0.640 226Ra
α 5.536 222Fr
227Ac trace 21.772 y β 0.045 227Th
α 5.042 223Fr
t  h  u
· r

Ang actinyo (Iningles actinium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Ac ug kaiphan nga atomik 89. Ang actinyo mao ang aktinido.

Ang mga gi basihan niini[usba | edit source]



Galeriya sa hulagway[usba | edit source]