An element has six electrons in the valence shell, so it requires 2 electrons to attain the noble gas configuration. Therefore, charge on the ion will be -2.
Noble gas has 8 electrons in the valence shell. So, the element gains 2 electrons to attain noble gas configuration.
- An atom that gains or loses electron become an ion.
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If it gains an electron, it become negative ion called anion.
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If it loses an electron, it become positive ion called cation.
Hence, we can conclude that, here atom has 6 valence electrons, it gains 2 electrons to form a negatively charged ion. Therefore, charge on the ion will be -2.
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