95
Am
243
Americium
Element 95 · 243 u · f-block
actinide
Found in household smoke detectors (Am-241). Named after the Americas, by analogy with europium above it.
Phase (STP)
Solid
Melting Point
1176 °C
Boiling Point
2011 °C
Density
13.69 g/cm³
Electronegativity
1.13
Atomic Radius
175 pm
Ionization Energy
578 kJ/mol
Electron Affinity
—
Discovered
1944 · Glenn T. Seaborg
Electron Configuration
[Rn] 5f7 7s2
Electron Orbitals
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