Determine the type of chemical bond and the oxidation state of atoms in the following substances Fe2O3 Fe2O3 H3PO4 Br2 H2S

1. Chemical bond:
Fe2O3 is a basic oxide, the substance consists of a metal and a non-metal, therefore the bond is ionic.
H3PO4-acid, consists of non-metals with electronegativity differences, such a composition is characteristic of a covalent polar bond.
Br2-substance consists of two identical non-metals (with the same electronegativity), which is typical for a covalent non-polar bond.
H2S is two different non-metals, hence the covalent polar bond.
2. Degree of oxidation.
It must be remembered that oxygen most often has oxidation lilac -2, and hydrogen +1
Fe2 (+3) O3 (-2)
H3 (+1) P (+5) O4 (-2)
Br2 (0)
H2 (+1) S (-2)