Radium is a radioactive element whose nucleus emits an ?? particle (a helium nucleus) with a kinetic
Radium is a radioactive element whose nucleus emits an 𝛼 particle (a helium nucleus) with a kinetic energy of about 7.8 × 10−13 J (4.9 MeV). To what amount of mass is this energy equivalent? Apr 25 2022 08:12 PM
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