Question
Sodium atom is highly reactive, but sodium ion is not. Explain.
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Answer
Sodium atom has the electronic configuration (2, 8, 1). Because of the presence of one electron in its valence shell, it can easily donate it to any other non-metallic element, and hence is most reactive. Sodium ion has electronic configuration (2, 8). As its valence shell is of eight electrons like neon gas, therefore, it is non-reactive in nature.
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