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MHT CET Medical202626 April 2026Morning ShiftChemistryStructure of AtomActual

How many total number of s and p electrons are respectively present in Cl ^- ?

Options

  1. A6 and 11
  2. B6 and 12
  3. C2 and 7
  4. D11 and 6

Correct answer

B. 6 and 12

Step-by-step solution

The atomic number of Chlorine ( Cl ) is 17 . The Cl ⁻ ion has gained one electron, making the total number of electrons 17 + 1 = 18 . The electronic configuration of Cl ⁻ is 1s² 2s² 2p⁶ 3s² 3p⁶ . Total number of s electrons = 2 + 2 + 2 = 6 . Total number of p electrons = 6 + 6 = 12 . Answer: 6 and 12

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