Atoms in a covalent bond are held together by what? ?

this is because nonmetals. the elements that form covalent bonds want to share the electrons to creat an ocet when this happens the positively charged nucleus has and attraction for the valence, or outer most, electrons of its own atoms as well as for the electrons in the atom that it is trying to share electrons with

Sorry i dont understand the question can you rephase it?

Replicate prove reliability and validity