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Atoms — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsAtoms2 Marks
Question
Why do $\alpha$-particles have high ionising power?
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Answer

$\alpha$-particles are heavier, they move slowly; so possess large momentum. Due to this property they come in contact with large number of particles; so they possess high ionising power.

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