Home
PropertiesCalculatorFun
Actinium
(Ac)
2818321892
Ac
Category
Actinoid
Series
actinide
Relative atomic mass
227
Density
10.07
Melting point (°C)
1047
Boiling point (°C)
3197
Electronegativity (Pauling)
1.1
Half-life
21.8 y
Discovery year
1899
Discovered by
PierreMarie Curie
Electrons: 89
Protons: 89
Neutrons: 138

Wikipedia

Wikipedia
Decay chain
  1. Ac-227(21.8 y)
    β⁻ decay
  2. Th-227(18.7 d)
    α decay
  3. Ra-223(11.4 d)
    α decay
  4. Rn-219(3.96 s)
    α decay
  5. Po-215(1.78 ms)
    α decay
  6. Pb-211(36.1 min)
    β⁻ decay
  7. Bi-211(2.14 min)
    α decay
  8. Tl-207(4.77 min)
    β⁻ decay
  9. Pb-207(stable)stable
created by @lukaswyss
Actinium (Ac) – Element 89