When hydrogen and oxygen are bound together each have a slight charge. This is probably the most important property of water biologically. It's so you've got ionic bonds the van der Waals forces. Are they nuclear forces? No. I think it's a covalent. A polar covalent molecule. So it's a strong bond then if it’s covalent, right? Covalent which he thinks is the double bond. That's a strong Bond. It's more carbon. Yeah. Look. One's heavier one's lighter. One's got red hair and the other does it. But generally speaking when they're. 1/2 as heavy or 2