Chemical bond: Determine the type of bond in all substances H2, HF, AGCL, RaO, OF2, ZN, N2O5, CL2, SO2.

A covalent bond occurs between atoms of non-metals and is polar and non-polar. A non-polar bond is formed by the atoms of one element – in the list these are H2, CL2. It is called non-polar, because the total electrons are not displaced in one direction, they are located at the same distance from the nuclei.

A covalent polar bond, that the common electrons are displaced in one direction, are located at different distances from the nuclei: HF, OF2, N2O5, SO2.

Metallic bond occurs in metals. A feature of metal atoms is a small number of electrons at the outer level and relatively large radii. Therefore, metal atoms, unlike non-metal atoms, easily donate external electrons and turn into positive ions: Zn.

As a rule, metals with non-metals form an ionic bond with each other. Having a large nucleus, metal atoms donate their electrons to non-metals: AgCL, RaO.