1. Tardigrade
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  3. Chemistry
  4. Which of the following best describes the most likely pathway for the K-ion to achieve a noble gas electron configuration.

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Q. Which of the following best describes the most likely pathway for the $K^{-}ion$ to achieve a noble gas electron configuration.

NTA AbhyasNTA Abhyas 2020

Solution:

$\frac{K^{-}}{\left[Ne\right] 3 s^{2} 3 p^{6} 4 s^{2}}\overset{- 2 e^{-}}{ \rightarrow }\overset{- 2 e^{-}}{\underset{\text{Noble gase }^{-} \text{config. }}{\underbrace{\left[Ne\right] 3 s^{2} 3 p^{6}}}}$