Respuesta :

Barium have 2 valence electrons.

Neon is a noble gas with 8 valence electrons

Carbon and silicon both have same valence electrons that is 4...

Hope it helps you to not get lost lol

Answer: silicon and carbon


Explanation:

barium has 2 valance electronsNeon has 8 valence electronsSilicon has 4 valence electronsCarbon has 4 valence electrons