What are the basic properties of Actinium?
Actinium (symbol: Ac) is a actinide with atomic number 89. Its atomic mass is 227.0 u, and it belongs to period 7 and group 3.
Actinium (Ac) Properties and Facts
Element 89 - Actinide
What is the electron configuration of Actinium?
The electron configuration is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 6s²
What are the physical properties of Actinium?
Melting point: 1323.0 K
Boiling point: 3471.0 K
Density: 10.0 g/cm³
What are the known isotopes of Actinium?
- Ac-225: Half-life of 10 days
- Ac-226: Half-life of 29 hours
- Ac-227: Half-life of 21.8 years
- Ac-228: Half-life of 6.15 hours
- Ac-229: Half-life of 62 minutes
What is the biological role and occurrence of Actinium?
Biological role: Highly radioactive and toxic
Natural occurrence: Found in uranium and thorium ores