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.

When electrons are added to the outermost shell of a carbon atom, it forms an anion that has a larger radius. An anion always has a larger radius than a neutral atom of the same element. This is because more electrons causes greater repulsion between its nucleus and electrons, making the electrons move farther away from the center.

Cause its being chemically applied?

Compound with sulfer  is bright red