Chemistry, 23.11.2020 14:50 sabrinarasull1pe6s61

Plz help me its the last question If an atom of Thulium, Tm, has a mass of 172 and ejects an alpha particle, what is the new mass and atomic number? What element does this atom belong to now?

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Plz help me its the last question If an atom of Thulium, Tm, has a mass of 172 and ejects an alpha...