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Cesium has 55 protons. The non-ionic form has 55 electrons. The number of neutrons, however, varies depending on which isotope you are talking about. The stable isotope 133Cs has 78 neutrons. The most commonly used unstable isotope 137Cs has 82 neutrons. There are isotopes of cesium ranging all the way from 112Cs at 57 neutrons to 151Cs at 96 neutrons. For more information, please see the Related Link below.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoCaesium, spelled cesium in the U.S., must always have 55 protons. The average of all of its possible isotopes is 140.116 neutrons, but obviously a single atom must have a whole number. The only stable cesium isotope has 58 neutrons.
Wiki User
∙ 11y agoCesium has about 14 protons and 12 protons your-welcome
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∙ 14y ago55 electrons
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