Is rhenium an element or compound?
Is rhenium an element or compound?
Rhenium is a chemical element with symbol Re and atomic number 75. Classified as a transition metal, Rhenium is a solid at room temperature.
Is rhenium a compound?
Rhenium is among the rarest metals on Earth. It does not occur uncombined in nature or as a compound in a mineable mineral species. It is, however, widely spread throughout the Earth’s crust to the extent of about 0.001 parts per million.
What element family is rhenium in?
transition group
Rhenium, element 75 on the periodic table, belongs to the cluster of elements known as the transition group of elements. It was the last of the natural elements to be discovered, some 50 years after the introduction of the periodic table.
How does rhenium react with elements?
Chemical properties 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 ).
What are some compounds made from rhenium?
Perrhenic acid (HReO4) and its anhydride, the heptoxide, and the perrhenates are common stable compounds in which rhenium is in the +7 state. Natural rhenium is a mixture of the stable isotope rhenium-185 (37.4 percent) and the radioactive rhenium-187 (62.6 percent, 4.1 × 1010-year half-life).
Why is rhenium an element?
Discovered in 1925, rhenium was the last stable element to be discovered. It was named after the river Rhine in Europe. Nickel-based superalloys of rhenium are used in combustion chambers, turbine blades, and exhaust nozzles of jet engines….
| Rhenium | |
|---|---|
| Atomic number (Z) | 75 |
| Group | group 7 |
| Period | period 6 |
| Block | d-block |
How do you make rhenium?
Rhenium powder can be produced by the reduction of pure ammonium perrhenate NH4ReO4 in a stream of hydrogen. The first reduction stage is at 300 – 350°C to form ReO2 and the second reduction stage is at 800°C where rhenium powder is formed [3].
What is made of rhenium?
Rhenium is used with platinum as catalysts in the production of lead-free, high-octane gasoline. The metal is used in alloys for jet engines and in tungsten and molybdenum based alloys. It is widely used as filaments for mass spectrographs. Rhenium is also used as an electrical contact material.
What are rhenium chemical properties?
(The melting point of rhenium, 3,180 °C [5,756 °F], is exceeded only by those of tungsten and carbon.)…rhenium.
| atomic number | 75 |
|---|---|
| melting point | 3,180 °C (5,756 °F) |
| boiling point | 5,627 °C (10,161 °F) |
| specific gravity | 20.5 at 20 °C (68 °F) |
| oxidation states | +1, +2, +3, +4, +5, +6, +7 |