The Element Hassium

Hassium was first developed by Peter Armbruster, Gottfried Münzenber in 1984, and the team of GesellschaftfürSchwerionenforschung in Darmstadt, Germany. They bombed 208 lead atoms with iron ions 58 using a device called a linear accelerator. This produces atoms of Hashium 265, isotopes with a half-life of about 2 milliseconds (0.002 seconds), and free neutrons.

Hassium's most stable isotope, Hassium-270, has a half-life of about 22 seconds. Collapse to alfa-Vol 266 through alpha collapse

Since a small amount of ha has never existed, it is not useful any more than basic science research at the moment.

According to the naming of Mendeleev's unnamed, undiscovered elements, Hassium should be called Eka Osmium. In 1979, IUPAC published several recommendations based on its elements called unniloctium (corresponding Uno symbol). Determine the system element name, the element is discovered (and discovered and confirmed). Chemistry classes and advanced textbooks are widely used in the chemical industry, but these recommendations are largely ignored by scientists in this field, and "Element 108", the symbols E 108, (108), or simply 108 It is called, or use the recommendations. Name "Hashium"

In the periodic table of elements, it is a transimine element in the d region. Hassim is a member of No. 7 and belongs to the eighth element: hence it is the sixth member of the transition metal 6 d series. Chemical experiments have confirmed that hashium appears as a heavier homologue of ruthenium in group 8. The chemical nature of hashium is characterized only in part, but its chemical properties are equivalent to those of the other eight elements. Many of them are expected to be silver metal where Hassium readily reacts with oxygen in the air to form volatile tetraoxide.

Although all the elements exceeding oganesson have been discovered, only the co (element 112), ni (element 113), and the element (element 114) whose chemical properties are known exist in the hash element (element 108) Only exist. There is sufficient evidence to show that there is a certain classification. Due to the relativistic effect, the behavior of other elements may be different from the behavior of extrapolation prediction; for example, even though flerobium currently belongs to the carbon family, it exhibits properties like inert gases Is expected. There is still doubt about the current experimental evidence. Is it like metal or inert gas?

The volatile ha compound (arsenic tetraoxide) selected for gas phase chemistry research from the beginning is clear, but the chemical nature of hash has long been considered a difficult task. Isotopes were first synthesized in 1984 but until 1996 it was not until 1996 that isotopes with sufficient long-lived lives were synthesized for chemical studies. Unfortunately, this isotope 269H is indirectly synthesized by the collapse of 277 CN; the indirect synthesis method is not only disadvantageous for chemical studies, the reaction yield of the isotope 277 CN is low Area is only 1 pb), not enough arsenic is provided. Atoms are used for chemistry research. Direct synthesis of 269 Hs and 270 Hs in the reaction It seems that 248 Cm (26 Mg, xn) 274 - x Hs (x = 4 or 5) is expected to be 7 pb because the reaction cross section is slightly large.