Rhodium has a nuclear charge of 45. The effective nuclear charge is defined as the net positive charge found in an atom. This means the nuclear charge is equal to the atomic number.
Rhodium has low electrical resistance but high resistance to corrosion. This is why it is used to coat optic fibres, form thermocouple elements and aid in the production of headlight reflectors. It is predominantly needed in the manufacture of catalytic converters but also finds purpose in the crafting of jewellery.
Rhodium is a transition metal whose name comes from the Greek word for rose. It has no known biological function.