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#actinium
#radioactive metal
#silvery metal
#metallic element
#ac
#element 89
#radioactivity
1️⃣⚛️⛓️
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#actinium
#actinide series
#first actinide
#element 89
#f-block element
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#actinium
#aktinos
#aktis
#greek name origin
#radioactive ray
#beam
#radiation
#element 89
Ac8️⃣9️⃣
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#actinium
#ac
#element 89
#atomic number 89
#chemical symbol
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#actinium
#radioactive
#radioactivity
#blue glow
#element 89
#ac
#chemical element
#actinium #radioactive metal #silvery metal #metallic element #ac #element 89 #radioactivity