Find the neutral atom in the periodic table which has the same number of electrons as K⁺ and Cl^-. What is this number?

Potassium (K) has 19 electrons, it loses one electron to form K⁺ 

Therefore, it has 19-1 = 18 electrons.

Chlorine (Cl)  has 17 electrons, it gains one electron to form Cl^- 

Therefore, it has 17 + 1= 18 electrons.

 The atomic number of argon is also 18.

Hence, we can say that  Argon is a neutral atom in the periodic table and has the same number of electrons as K⁺ and Cl^-.

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Updated on: 10-Oct-2022

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