Question

when electrons are added to the outermost shell of a carbon atom, it forms an anion that has a larger radius. an anion that has a smaller radius. a cation that has a larger radius. a cation that has a smaller radius.

Explanation:

当电子添加到碳原子的最外层时，原子获得电子形成阴离子。由于电子数增加，电子间排斥力增大，电子云扩展，阴离子半径比原子半径大。

Answer:

an anion that has a larger radius.