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12 February, 03:25

A Potassium (K) atom attains a stable electron configuration when it combines with.

one chlorine atom

two chlorine atoms

one calcium atom

two calcium atoms

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  1. 12 February, 03:38
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    Answer is: one chlorine atom.

    They form ionic compound potassium-chloride (KCl).

    Electron configuration of potassium: ₁₉K 1s²2s²2p⁶3s²3p⁶4s¹.

    Electron configuration of chlorine: ₁₇Cl 1s²2s²2p⁶3s²3p⁵.

    Potassium lose one electron to attains a stable electron configuration of noble gas argon (Ar).
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