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physical object > natural object > collection of particles > phase of matter > solid > metal > actinide > transuranium element > americium > americium 242
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americium 242 comparison table
Subject has nuclear spin has decay mode is a kind of has number of neutron has definition has number of nucleon has half life has nuclear magnetic moment is an instance of has symbol has atomic mass
americium  radioactive element radioactive silvery metal which does not occur naturally    Am 
americium 242I = 1-γ 147 242 μ = +0.388americium242Am242.056541

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