پروميتيوم (په انگرېزي: Promethium) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Pm سمبول او ۶۱ اتمي شمېرې په وسیله ښودل شوی دی.
چټک مالومات عمومي خواص, Pronunciation ...
Promethium, 61Pm Promethium spectrum visible.pngSpectral lines of promethium |
|
| Pronunciation | /proʊ-ˈmiːθiəm/
pro-MEE-thee-əm |
|---|
| Appearance | metallic |
|---|
|
|
|
| اټومي شمیره (Z) | 61 |
|---|
| گروپ, پیریود | group n/a, period 6 |
|---|
| بلاک | f-block |
|---|
| Element category | lanthanide |
|---|
| Mass number | 145 (most stable isotope) |
|---|
| Electron configuration | [Xe] 4f5 6s2 |
|---|
Electrons per shell | 2, 8, 18, 23, 8, 2 |
|---|
|
| حالت (at STP) | جامد |
|---|
| دويلې کيدو ټکى | 1315 K (1042 °C, 1908 °F) |
|---|
| يشنا ټکی | 3273 K (3000 °C, 5432 °F) |
|---|
| Density near r.t. | 7.26 g/cm3 |
|---|
| Heat of fusion | 7.13 kJ/mol |
|---|
| Heat of vaporization | 289 kJ/mol |
|---|
|
| Oxidation states | 3, 2 (a mildly basic oxide) |
|---|
| Electronegativity | Pauling scale: 1.13 (?) |
|---|
| Ionization energies | - 1st: 540 kJ/mol
- 2nd: 1050 kJ/mol
- 3rd: 2150 kJ/mol
-
|
|---|
| Atomic radius | empirical: 183 pm |
|---|
| Covalent radius | 199 pm |
|---|
|
| Crystal structure | double hexagonal close-packed (dhcp) Double hexagonal close packed crystal structure for promethium |
|---|
| Thermal expansion | 9.0 µm/(m·K)[۱] (at r.t.) |
|---|
| د تودوخې تېرېدنه | 17.9 W/(m·K) |
|---|
| Electrical resistivity | est. 0.75 µΩ·m (at r.t.) |
|---|
| Magnetic ordering | paramagnetic[۲] |
|---|
| Young's modulus | α form: est. 46 GPa |
|---|
| Shear modulus | α form: est. 18 GPa |
|---|
| Bulk modulus | α form: est. 33 GPa |
|---|
| Poisson ratio | α form: est. 0.28 |
|---|
| CAS Number | 7440-12-2 |
|---|
|
| Discovery | Chien Shiung Wu, Emilio Segrè, Hans Bethe (1942) |
|---|
| First isolation | Charles D. Coryell, Jacob A. Marinsky, Lawrence E. Glendenin, Harold G. Richter (1945) |
|---|
| Named by | Grace Mary Coryell (1945) |
|---|
|
| آيسوټوپ |
Abundance |
نیم ژوند (t1/2) |
Decay mode |
Product |
| 145Pm |
syn |
17.7 y |
ε |
145Nd
کينډۍ:Infobox element/isotopes decay2 |
| 147Pm |
trace |
2.6234 y |
β− |
147Sm |
|
| | references | in Wikidata |
تړل
