<Tr> <Td> Cu + e = </Td> <Td> Cu </Td> <Td> + 0.16 </Td> </Tr> <Tr> <Td> Ag + e = </Td> <Td> Ag </Td> <Td> + 0.80 </Td> </Tr> <Tr> <Td> Br + 2e = </Td> <Td> 2Br </Td> <Td> + 1.07 </Td> </Tr> <Tr> <Td> Cl + 2e = </Td> <Td> 2Cl </Td> <Td> + 1.36 </Td> </Tr>

The oxidation number of a reducing agent can change from