Question

Why carbon cannot gain or lose 4 electron?

Answer 1

carbon cannot gain four electron forming C4 - ANION. but it would be difficult for the nucleus with six protons to hold on to ten electrons that is 4 extra electrons..
carbon cannot loose four electrons C4+ CATION. but it would require large amount of energy to remove 4 electrons leaving behind a carbon cation with six protons in its nucleus holding on to just two electrons.

Answer 2

Answer:

Carbon cannot gain or lose electrons. Carbon cannot form C4- because If it gains 4 electrons, it would be difficult for the nucleus with six protons to hold on to ten electrons, that is, four extra electrons.

Carbon cannot form C4+ because if it loses 4 electrons, it would require a large amount of energy to remove 4 electrons leaving behind a carbon cation with six protons in its nucleus holding on to just 2 electrons. Carbon overcomes this problem by sharing its valence electrons with other atoms of carbon or with atoms of other elements.

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