Cuales son los electrones que participan en un enlace quimico

Cuando se forma un enlace químico, solo los electrones de la capa exterior participan en el proceso de enlace.

Ifound this on google “here are some features of the alveoli that allow this: they give the lungs a really big surface area. they have moist, thin walls (just one cell thick) they have a lot of tiny blood vessels called capillaries.for more information go to the website below › bitesize › guidesi hope this you for what your looking for. can you plz mark me brainliest?