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GENERAL PROPERTIES
Nome Actinium
simbolo Ac
Numero atomico 89
Element category actinide
Group 3
Period 7
Block f
Density 10070 kg/m3
ATOMIC PROPERTIES
Atomic weight 227 amu
Atomic radius 195 pm
e− Energy level
2, 8, 18, 32, 18, 9, 2
Oxidation states 3
Crystal structure
face-centered cubic
PHYSICAL PROPERTIES
Phase solid
Melting point 1323 K
Boiling point 3471 K
Molar volume
2.255x10E-5 m3/mol
Latent heat 62 kJ/mol
MISCELLANEA
CAS number 7440-34-8
Electronegativity 1,1
Thermal conductivity
12 W/(m K)
1st: Ionization energies
499 kJ/mol
2nd: Ionization energies
1170 kJ/mol |
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