Question

What is unique about carbons valence shell?

Answer 1

Answer: Carbon's valence shell is unique because it has 4 valence shell electrons, which means it is less likely to gain or lose electrons to other elements. Rather, it shares its electrons. In other words, it tends to form covalent bonds (4) rather than ionizing. This results in carbon being able to form long chains or rings.

Answer 2

The carbon atom has four valence (outermost) electrons. Because of this unique configuration, it is easier for the carbon atom to share its four electrons with another atom or atoms than to lose or gain four electrons.