Rhenium is a rare, silvery-grey metal that was discovered in 1925 by Ida Noddack, Walter Noddack, and Otto Berg in Germany. It has a very high melting point of over 3000°C and does not readily react with oxygen or some acids. Rhenium occurs naturally in molybdenum and copper ores and is often obtained as a byproduct of mining those elements. It exists in several compounds including fluorides, chlorides, bromides, iodides, oxides, sulfides, and tellurides. Rhenium has applications in high-temperature turbines and engines due to its strength and corrosion resistance at high temperatures.

1. RHENIUM

2. Who discovered it?
Ida tacke Noddack
Walter Noddack
Otto Berg
In 1925 at Germany

3. Properties
• Symbol: Re
• Atomic number: 75
• Atomic mass: 186.207
• State: Solid
• Color: Greyish white
• Melting point: 3186 oC
• Boiling point: 5596 oC

4. • Rhenium is a ductile, malleable, silvery metal.
Ductile means capable of being drawn into thin
wires. Malleable means capable of being
hammered into thin sheets.
• Rhenium is a moderately stable metal. It does not
react with oxygen and some acids very readily.
But it does react with strong acids such as nitric
acid (HNO 3 ) and sulfuric acid (H 2 SO 4 ).

5. Occure In nature
• About a third of all rhenium used in the United
States comes from copper and molybdenum ores
in the Western states. It is obtained during the
process of copper mining. Two-thirds are
imported from other countries, primarily Chile,
Germany, and the United Kingdom. The principal
ores of rhenium are molybdenite, gadolinite, and
columbite.
• Rhenium is one of the rarest elements in the
world. Its abundance is thought to be about one
part per billion.

6. Compound
• Fluorides
• Rhenium hexafluoride: ReF6
• Rhenium tetrafluoride: ReF4
• Rhenium pentafluoride: ReF5
• Rhenium heptafluoride: ReF7
• Chlorides
• Rhenium hexachloride: ReCl6
• Rhenium tetrachloride: ReCl4
• Rhenium pentachloride: ReCl5
• Trirhenium nonachloride: [ReCl3]3
• Bromides
• Rhenium tetrabromide: ReBr4
• Rhenium pentabromide: ReBr5
• Trirhenium nonabromide: [ReBr3]3

7. • Iodides
• Rhenium tetraiodide: ReI4
• Trirhenium nonaiodide: [ReI3]3
• Oxides
• Rhenium dioxide: ReO2
• Rhenium trioxide: ReO3
• Dirhenium trioxide: Re2O3
• Dirhenium heptoxide: Re2O7
• Sulfides
• Rhenium disulphide: ReS2
• Dirhenium heptasulphide: Re2S7
• Selenides
• none listed
• Tellurides
• Rhenium ditelluride: ReTe2

8. Reaction
• Reaction of rhenium with air
4Re(s) + 7O2(g) → 2Re2O7(s)
• Reaction of rhenium with water
Rhenium does not react with water under
normal conditions.

9. • Reaction of rhenium with the halogens
• Re(s) + 3F2(g) → ReF6(s)
• 2Re(s) + 7F2(g) → 2ReF7(s)

10. • Reaction of rhenium with acids
• In similar fashion to technetium, immediately
above rhenium in the periodic table, rhenium is
insoluble in hydrochloric acid (HCl) and
hydrofluoric acid (HF). It does dissolve in nitric
acid, HNO3, or concentrated sulphuric acid,
H2SO4, both of which are oxidizing, to form
solutions of perrhenic acid, HReO4. In this form,
the rhenium is in the formal +7 oxidation state.

12. WHAT IS IT USED FOR?
motor
Rhenium wire
Oven
Turbines engines

13. FACTS:
May cause eye and skin
irritation. Rhenium Liquid
may cause burns to skin and
eyes. May cause irritation of
the digestive tract when
ingested.
The usual commercial
Form of the elment is powder
But it can also be found consolidated
It can be bent, coiled or rolled.