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Nuclei — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsNuclei1 Mark
MCQ
After losing two electrons, an atom of Helium becomes equivalent to:
  • A
    $\alpha$ -particle
  • B
    $\beta$ -particle
  • C
    $\gamma$ -particle
  • D
    Deuterium nucleus
✓

Answer

  1. $\alpha$ -particle

Explanation:

$^4_2$He→$^4_2$He+2+2e−

$^4_2$​He+2 is alpha particle. Because it has charge equal to +2e and mass is four times the mass of one proton.

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