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31-12-2017
Chemistry

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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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Dejanras Dejanras

04-01-2018

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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