| 31. | The emission of alpha particles by the radium was responsible.
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| 32. | :Alpha particles are nothing more nothing less than helium nuclei.
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| 33. | Alpha particles are a highly ionizing form of particle radiation.
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| 34. | The radioactive source emits alpha particles into both chambers, which ionizes some air molecules.
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| 35. | Short-range alpha particles emitted by the metal kill cancer cells.
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| 36. | The alpha particles from the radium cause neutrons to be emitted from the beryllium.
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| 37. | However alpha particles are easily attenuated if the active layer is made too thick.
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| 38. | Alpha particles are shielded by even light amounts of material.
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| 39. | Alpha particles emitted by polonium ionize air molecules that neutralize charges on the nearby surfaces.
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| 40. | Other nuclei, such as alpha particles, are less prevalent.
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