what are alpha - particles?
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Symbol: α, He²⁺, α²⁺
Mass: 4.001506179125(62) u, 3.727379240(82) GeV/c², 6.64465675(29)×10⁻²⁷ kg
here is ur answer...
It is a helium nucleus emitted by some radioactive, substances originally regarded as a ray.
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