Which symbol corresponds to ion with 1+ charge, atomic number 55, and 78 neutrons

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Chemistry

Answer

Ion Symbol Determination

Step-by-Step Analysis to Determine the Ion Symbol

  • Atomic number = 55 → This identifies the element as Cesium (Cs).
  • Number of neutrons = 78
  • Mass number (A) = protons + neutrons = 55 + 78 = 133
  • Charge = 1+ → The ion has lost one electron compared to its neutral atom.
Therefore, the ion is Cesium with a mass number of 133 and a +1 charge.
133Cs+

Final Answer:

Ion Symbol: 133Cs+

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