Answers: 1
, 
, and 
- in case cesium-129 is what you were referring to.
as seen on a modern periodic table. A cesium atom nucleus would thus contain an equal number of protons; in addition to that, a neutral atom of cesium would contain the same number of electrons in its electron cloud. 
.
and contains 
neutrons.
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How many protons electrons and neutrons respectively does 29 cs have...
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