Рений
75
Re
Група
7
Период
6
Блок
d
Протони
Електрони
Неутрони
75
75
111
Главни свойства
Атомен номер
75
Атомна маса
186.207
Масов номер
186
Категория
Преходни метали
Цвят
Сив
Радиоактивни
Не
From the Latin word Rhenus meaning Rhine
Кристална структура
Обикновен шестоъгълник
История
In 1908, Japanese chemist Masataka Ogawa announced that he discovered the 43rd element.
However, later analysis indicated the presence of rhenium (element 75), not element 43.
In 1922, Walter Noddack, Ida Eva Tacke and Otto Berg announced its separation from gadolinite and gave it the present name.
However, later analysis indicated the presence of rhenium (element 75), not element 43.
In 1922, Walter Noddack, Ida Eva Tacke and Otto Berg announced its separation from gadolinite and gave it the present name.
Електрон на обвивка
2, 8, 18, 32, 13, 2
Електронна конфигурация
[Xe] 4f14 5d5 6s2
Chile has the world's largest rhenium reserves
Физични свойства
Фаза
Твърди
Плътност
21.02 g/cm3
Температура на топене
3459.15 K | 3186 °C | 5766.8 °F
Температура на кипене
5869.15 K | 5596 °C | 10104.8 °F
Топлина на сливането
33 kJ/mol
Топлина на изпаряване
705 kJ/mol
Специфичен топлинен капацитет
0.137 J/g·K
Изобилие в земната кора
2.6×10-7%
Изобилие в вселената
2×10-8%
Кредити за снимката: Wikimedia Commons (Alchemist-hp)
A high purity rhenium single crystal made by the floating zone process, an ebeam remelted rhenium bar and as well as a high purity rhenium cube for comparison
Номер на CAS
7440-15-5
Номер на PubChem CID
23947
Атомни свойства
Атомен радиус
137 pm
Ковалентен радиус
151 pm
Електроотрицателност
1.9 (Скала на Полинг)
Йонизационен потенциал
7.8335 eV
Моларен обем
8.85 cm3/mol
Топлопроводимост
0.479 W/cm·K
Оксидационни държави
-3, -1, 1, 2, 3, 4, 5, 6, 7
Приложения
Rhenium is widely used as filaments for mass spectrographs and ion gauges.
It is also used with platinum as catalysts in the production of lead-free, high-octane gasoline.
Nickel-based superalloys of rhenium are used in the combustion chambers, turbine blades, and exhaust nozzles of jet engines.
It is also used with platinum as catalysts in the production of lead-free, high-octane gasoline.
Nickel-based superalloys of rhenium are used in the combustion chambers, turbine blades, and exhaust nozzles of jet engines.
Very little is known about the toxicity of rhenium
Изотопи
Стабилни изотопи
185ReНестабилни изотопи
160Re, 161Re, 162Re, 163Re, 164Re, 165Re, 166Re, 167Re, 168Re, 169Re, 170Re, 171Re, 172Re, 173Re, 174Re, 175Re, 176Re, 177Re, 178Re, 179Re, 180Re, 181Re, 182Re, 183Re, 184Re, 186Re, 187Re, 188Re, 189Re, 190Re, 191Re, 192Re, 193Re, 194Re