What relationship exists between the electron structure of a Group A ion and the electron

Question

structure of the nearest noble gas?

Why do boron, carbon and silicon not form simple ions? How do they satisfy their electron requirements?

Answer 1

Group A ions are isoelectronic with their nearest noble gas.

C and Si have four electrons in the outside shell thus they have an even tendency to lose four electrons or to gain four electrons. Therefore, they do neither; rather, they share eight electrons with other elements for form compounds.