| 41. | Each impact of an alpha particle on the screen produced a tiny flash of light.
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| 42. | This is particularly important with alpha particles which are easily stopped by a small mass.
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| 43. | Beta particles are electrons or positrons and can travel farther than alpha particles in air.
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| 44. | Ernest Rutherford discovered the alpha particle and also developed the nuclear theory of atomic structure.
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| 45. | Alpha particles emitted by polonium ionize air molecules that neutralize charges on the nearby surfaces.
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| 46. | The alpha particles reheat the plasma while the energy of the neutrons can be extracted.
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| 47. | Polonium is dangerous both as an alpha particle emitter and because it is chemically toxic.
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| 48. | Other nuclei, such as alpha particles, are less prevalent.
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| 49. | It radiates a low level dose of alpha particles.
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| 50. | Then, three detectors will measure whatever sputters off _ reflected alpha particles, or protons, or x-rays.
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