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physical object > natural object > collection of particles > phase of matter > solid > metal > actinide > actinium > actinium 226

actinium 226 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	is an instance of	has symbol	has atomic mass
actinium			radioactive element		soft, silvery-white, radioactive metal which glows in the dark				Ac
actinium 226	I = 1-	γ		137		226	29 hours	actinium	226Ac	226.026084

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