د ويکيپېډيا، وړیا پوهنغونډ له خوا
Rhenium, 75 Re Pronunciation / ˈ r iː n i ə m / REE -nee-əmAppearance silvery-grayish اټومي شمیره (Z ) 75 گروپ , پیریود group 7 , period 6 بلاک d-block Element category transition metal معياري اټومي وزن (A r ) کينډۍ:Val [۱] Electron configuration [Xe ] 4f14 5d5 6s2 Electrons per shell
2, 8, 18, 32, 13, 2 حالت (at STP ) جامد دويلې کيدو ټکى 3459 K (3186 °C, 5767 °F) يشنا ټکی 5903 K (5630 °C, 10,170 °F) Density near r.t. 21.02 g/cm3 when liquid, at m.p. 18.9 g/cm3 Heat of fusion 60.43 kJ/mol Heat of vaporization 704 kJ/mol Molar heat capacity 25.48 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
3303
3614
4009
4500
5127
5954
Oxidation states 7, 6, 5, 4 , 3, 2, 1, 0, −1, −3 (a mildly acidic oxide)Electronegativity Pauling scale: 1.9 Ionization energies 1st: 760 kJ/mol 2nd: 1260 kJ/mol 3rd: 2510 kJ/mol (more ) Atomic radius empirical: 137 pm Covalent radius 151±7 pm Crystal structure hexagonal close-packed (hcp)Hexagonal close packed crystal structure for rhenium Speed of sound thin rod 4700 m/s (at 20 °C) Thermal expansion 6.2 µm/(m·K) د تودوخې تېرېدنه 48.0 W/(m·K) Electrical resistivity 193 nΩ·m (at 20 °C) Magnetic ordering paramagnetic [۲] Magnetic susceptibility (χ mol ) +67.6·10−6 cm3 /mol (293 K)[۳] Young's modulus 463 GPa Shear modulus 178 GPa Bulk modulus 370 GPa Poisson ratio 0.30 Mohs hardness 7.0 Vickers hardness 1350–7850 MPa Brinell hardness 1320–2500 MPa CAS Number 7440-15-5 Naming after the river Rhine (German: Script error: No such module "Lang". ) Discovery Masataka Ogawa (1908) First isolation Masataka Ogawa (1919) Named by Walter Noddack , Ida Noddack , Otto Berg (1925)
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رېنيوم (په انگرېزي : Rhenium ) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Re سمبول او v۵ اتمي شمېرې په وسیله ښودل شوی دی.
تاریخچه [ سمول ]
د استعمال ځایونه [ سمول ]
↑ Meija, J.; Coplen, T. B. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)" . Pure Appl. Chem. 88 (3): 265-91. doi :10.1515/pac-2015-0305 . https://www.degruyter.com/downloadpdf/j/pac.2016.88.issue-3/pac-2015-0305/pac-2015-0305.xml .
↑ Lide, D. R., المحرر (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (الطبعة 86th). Boca Raton (FL): CRC Press. د کتاب نړيواله کره شمېره 0-8493-0486-5 .
↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics . Boca Raton, Florida: Chemical Rubber Company Publishing. د کتاب پاڼي E110. د کتاب نړيواله کره شمېره 0-8493-0464-4 .
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