Name
Symbol
Ac
Ac
Atomic Number
89
89
Group
n/a
n/a
Period
7
7
Block
f
f
Abundance in Earth's crust
n/a
n/a
Abundance in Universe
n/a
n/a
General Properties
Atomic Weight
[227]
[227]
Category
Actinides
Actinides
Color
Silver
Silver
Radioactive
Yes
Yes
Crystal Structure
Face Centered Cubic
Face Centered Cubic
Physical Properties
Density (g/cm3)
10.07
10.07
Phase
Solid
Solid
Melting Point
1323.15 K | 1050 °C | 1922 °F
1323.15 K | 1050 °C | 1922 °F
Boiling Point
3471.15 K | 3198 °C | 5788.4 °F
3471.15 K | 3198 °C | 5788.4 °F
Heat of Fusion (kJ/mol)
14
14
Heat of Vaporization (kJ/mol)
400
400
Specific Heat Capacity (J/g·K)
0.12
0.12
Atomic Properties
Atomic Radius
-
-
Covalent Radius
215 pm
215 pm
Electronegativity (Pauling scale)
1.1
1.1
Ionization Potential (eV)
5.17
5.17
Atomic Volume (cm3/mol)
22.54
22.54
Thermal Conductivity (W/cm·K)
0.12
0.12
Oxidation States
3
3
Electron Configuration
[Rn] 6d1 7s2
[Rn] 6d1 7s2
Electrons per shell
2, 8, 18, 32, 18, 9, 2
2, 8, 18, 32, 18, 9, 2