Element 75
Rhenium
Transition metals
Rhenium (Re) is in the d-block of the periodic table — group 7, period 6.
Rhenium is a chemical element with symbol Re and atomic number 75.
Key data
- Atomic number
- 75
- Atomic mass
- 186.207 u
- Group / Period
- 7 / 6
- Block
- d-block
- Phase at STP
- Solid
- Density
- 21.02 g/cm³
- Melting point
- 3185.8 °C
- Boiling point
- 5595.9 °C
- Electron configuration
- [Xe] 4f14 5d5 6s2
Periodic table block
Rhenium is in the d-block (group 7, period 6). Elements land in the d-block when their highest-energy electrons fill a d subshell — these are the transition metals in the middle of the table.
New to this? Periodic table blocks explained: s, p, d, and f
Common uses
- •Jet engine alloys
- •Petroleum catalysts
- •Thermocouples
Discovery
Year: 1925
Discovered by: Masataka Ogawa
Named by: Walter Noddack
Frequently asked questions
What is the atomic number of Rhenium?
Rhenium has atomic number 75. Its symbol is Re and its atomic mass is 186.207 u.
What category of element is Rhenium?
Rhenium is classified as transition metals. It sits in group 7, period 6 of the periodic table.
What block of the periodic table is Rhenium in?
Rhenium is in the d-block (group 7, period 6). Its highest-energy electrons occupy the d subshell — you can see this in its electron configuration, [Xe] 4f14 5d5 6s2.
What is Rhenium used for?
Common uses of Rhenium include: Jet engine alloys, Petroleum catalysts, Thermocouples.
When was Rhenium discovered?
Rhenium was discovered in 1925 by Masataka Ogawa.
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