What type of element is dubnium?
radioactive transuranium element
dubnium (Db), an artificially produced radioactive transuranium element in Group Vb of the periodic table, atomic number 105. The discovery of dubnium (element 105), like that of rutherfordium (element 104), has been a matter of dispute between Soviet and American scientists.
Why is dubnium a metal?
Dubnium is a synthetic chemical element with the symbol Db and atomic number 105. Dubnium is highly radioactive: the most stable known isotope, dubnium-268, has a half-life of about 28 hours….
| Dubnium | |
|---|---|
| Mass number | [268] |
| Dubnium in the periodic table |
Is plutonium a metalloid?
A radioactive, silvery metal. Plutonium was used in several of the first atomic bombs, and is still used in nuclear weapons.
What are the chemical properties of dubnium?
Chemical Properties of Dubnium
| Group | 5 | Melting point |
|---|---|---|
| Block | d | Density (g cm−3) |
| Atomic number | 105 | Relative atomic mass |
| State at 20°C | Solid | Key isotopes |
| Electron configuration | [Rn]5f14 6d3 7s2 | CAS number |
Is plutonium an element or compound?
plutonium (Pu), radioactive chemical element of the actinoid series of the periodic table, atomic number 94. It is the most important transuranium element because of its use as fuel in certain types of nuclear reactors and as an ingredient in nuclear weapons.
Is antimony a metalloid?
Elemental antimony is a brittle, silver-white, shiny metalloid.
What is the compound of francium?
Francium is a chemical element with the symbol Fr and atomic number 87. Prior to its discovery, it was referred to as eka-caesium. It is extremely radioactive; its most stable isotope, francium-223 (originally called actinium K after the natural decay chain it appears in), has a half-life of only 22 minutes.
What number is francium?
87
Fact box
| Group | 1 | 21°C, 70°F, 294 K |
|---|---|---|
| Atomic number | 87 | [223] |
| State at 20°C | Solid | 223Fr |
| Electron configuration | [Rn] 7s1 | 7440-73-5 |
| ChemSpider ID | 4886484 | ChemSpider is a free chemical structure database |
What are the chemical and physical properties of dubnium?
Physical Properties of Dubnium
- Atomic Mass Average: 262.
- Boiling Point:
- Coefficient of lineal thermal expansion/K-1: N/A.
- Conductivity Electrical: Thermal: 0.58 W/cmK.
- Description: Man made radioactive element.
- Flammablity Class:
- Freezing Point: see melting point.
- Heat of Vaporization: kJ/mol.
What kind of research is dubnium used for?
It is set against an abstracted ‘fractal particle’ background. A highly radioactive metal, of which only a few atoms have ever been made. At present, it is only used in research. Dubnium has no known biological role.
What’s the difference between a non metal and a metalloid?
A non-metal is an element that does not possess the properties of a metal, that is, can’t be made into wire; neither can it conduct heat nor electricity. A metalloid is an element that has properties that are intermediate between those of metals and nonmetals.
Where are metalloids located on the periodic table?
A metalloid is an element that has properties that are intermediate between those of metals and nonmetals. Metalloids are located to the right of metals and to the left of nonmetals in the periodic table. They are solids under standard conditions and can easily form alloys with Metals.
What’s the difference between metals and nonmetals on the periodic table?
Metalloids : Just like nonmetals, metalloids are neither ductile nor malleable in nature. Metals: Metals are found in S, P, D and F blocks of the periodic table. Nonmetals: Nonmetals are found in S and P blocks of the periodic table. Metalloids: Metalloids are found in P block.
Which is an element that can form a metal?
They are solids under standard conditions and can easily form alloys with Metals. Some the elements that are generally considered metalloids include: boron, arsenic, antimony, silicon, germanium, selenium, polonium and tellurium. Metals: Metals are shiny in appearance.
