Hydrogen bonding between molecules requires a hydrogen atom bonded covalently to which kind of atom?

1. A hydrogen bond is a special and unusually strong case of a dipole-dipole force. 2. It appears when a hydrogen atom is attached to a highly electronegative atom. 3. The electronegative atoms named for this role are oxygen, fluorine and nitrogen. 4. The electronegative atom on one molecule then attracts the hydrogen atom on a nearby molecule. 5. Water is held together this way, which is why it behaves so unlike other small molecules. 6. Carbon and the metals listed do not pull hard enough on electrons, so hydrogen bonding does not arise with them. _Source: Siyavula Physical Sciences Grade 11 (Everything Science, CC BY 4.0), Chapter 4: Intermolecular forces_