Hydrogen bonds are responsible for the lattice structure of frozen water, for example, and for joining the two strands of DNA’s double helix. Chemists know that some hydrogen bonds are stronger ...

National 4 Atomic structure and properties relating to bonding Covalent compounds What is an atom? Well, everything is made of atoms! Atoms themselves are made of smaller particles.

Nitrogen atoms can form three covalent bonds, so a triple bond forms between them. The structure of nitrogen is N≡N, showing that it has three shared pairs of electrons.