Silver coins do not have ionic or covalent bonds. Silver coins are simply pieces of silver metal. Silver is a metallic element, which means that its atoms are held together by metallic bonds. In a metallic bond, the valence electrons of the metal atoms are free to move around the entire lattice of atoms, rather than being localized to a specific atom or molecule. This sea of electrons is what gives metals their characteristic properties, such as their shiny appearance, high electrical and thermal conductivity, and malleability.