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If carbon were to gain four electrons to form a C4- anion, this would be difficult mainly because

Question
If carbon were to gain four electrons to form a C4- anion, this would be difficult mainly because
It would require too little energy
The nucleus, with only six protons, would struggle to hold onto ten electrons
Carbon has no valence electrons
Carbon already has a full outer shell
Answer
The nucleus, with only six protons, would struggle to hold onto ten electrons
Detailed Explanation
A nucleus with just six protons would find it difficult to hold on to ten electrons (four extra, negatively charged electrons).
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