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Химический элемент Нобелий

102(259 )

No

Нобелий

Группа Актиниды  Температура плавления 827 ° С, 1521 ° F, 1100 К 
Период Точка кипения Неизвестно 
Блокировать ж  Плотность (г см -3 ) Неизвестно 
Атомный номер 102  Относительная атомная масса [259]  
Состояние при 20 ° C Твердый  Ключевые изотопы 259 Нет 
Электронная конфигурация [Rn] 5f 1 4 7s 2  Количество CAS 10028-14-5 

Использование и свойства элемента Нобелий

Image explanation

Nobelium is named after Alfred Nobel. The image features a Japanese ideograph (or virtue word) with various meanings including ‘master teacher’ and ‘noble’ - a pun on the origin of the element’s name. The background features imagery suggestive of particle ‘trails’ like those produced when radiation passes through a cloud chamber.

Appearance

Nobelium is a radioactive metal. Only a few atoms have ever been made. Its half-life is only 58 minutes.

Uses

Nobelium has no uses outside research.

Biological role

Nobelium has no known biological role. It is toxic due to its radioactivity.

Natural abundance

Nobelium is made by bombarding curium with carbon in a device called a cyclotron.

История химического элемента Нобелий

This element’s history is one of controversy. In 1956, a team led by Georgy Flerov at the Institute of Atomic Energy, Moscow, synthesised element 102 by bombarding plutonium with oxygen and got atoms of element 102, isotope-252. However, they did not report their success.

In 1957, the Nobel Institute of Physics in Stockholm announced isotope-253 which had been made by bombarding curium with carbon. Then in 1958, Albert Ghiorso at the Lawrence Berkeley Laboratory (LBL) claimed isotope-254, also made by bombarding curium with carbon. These claims were challenged by the Russians.

In 1962-63, the Russian Joint Institute of Nuclear Research, based at Dubna, synthesised isotopes 252 to 256. Ghiorso still insisted his group were the first to discover element 102, and so began years of recrimination, finally ending in the International Union of Pure and Applied Chemists deciding in favour of the Russians being the discoverers.

Химические свойства

Atomic radius, non-bonded (Å) 2.46 Covalent radius (Å) 1.76
Electron affinity (kJ mol−1) Unknown Electronegativity (Pauling scale) Unknown
Ionisation energies (kJ mol−1)  1st 641.632nd -3rd-4th -5th -6th -7th -8th-

Состояния окисления и изотопы Нобелий

Commonoxidation states 3, 2
Isotopes Isotope Atomic mass Natural abundance (%) Half life Mode of decay
  259No 259.101 - 58 m  α 
        EC 
        sf 

Данные о давлении и температуре

Specific heat capacity (J kg−1 K−1) Unknown Young's modulus (GPa) Unknown
Shear modulus (GPa) Unknown Bulk modulus (GPa) Unknown
Vapour pressure  
Temperature (K) 40060080010001200140016001800200022002400
400 600 800 1000 1200 1400 1600 1800 2000 2200 2400
Pressure (Pa) -----------
- - - - - - - - - - -
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