Question

models of compounds
· salt (nacl) is a compound made of two different elements: sodium and chloride.
· water (h₂o) is a compound made of two different elements: hydrogen and oxygen.
· carbon dioxide (co₂) is a compound made of two different elements: carbon and oxygen.
what do you think the black lines represent in the model?

Explanation:

In chemical - bonding models, lines represent chemical bonds between atoms.

Answer:

The black lines represent chemical bonds.