Unbinilium, also known as eka-radium or element 120, is the hypothetical chemical element in the periodic table with symbol Ubn and atomic number 120. Unbinilium and Ubn are the temporary systematic IUPAC name and symbol, which are used until the element is discovered, confirmed, and a permanent name is decided upon.
According to the extended table, Unbinilium (Ubn) is the 120th element of the periodic table. It is a hypothetical chemical element with a temporary name and does not have any fixed position till now. It can behave like Strontium but are less reactive than Barium and Radium .
Unbibium /uːnˈbɪbiəm/, also known as eka-thorium or simply element 122, is the currently hypothetical chemical element in the periodic table with the placeholder symbol of Ubb and atomic number 122.
Ununennium, also known as eka-francium or element 119, is the hypothetical chemical element with symbol Uue and atomic number 119.
Unbiunium, also known as eka-actinium or simply element 121, is the hypothetical chemical element with symbol Ubu and atomic number 121.
Because electrons have non zero rest mass, they cannot exceed the vacuum speed of light according to Einstein's theory of relativity. Thus, atoms with Z > 137 cannot exist. Legend has it that the great physicist, Richard Feynman, first argued that element 137 was the largest possible element2.
The element which comes on 128 number is Trititanium (Tt).
The Mendeleev table is currently composed of 118 chemical elements. Benoît Gall travelled to Russia and Japan in search of elements 119 and 120, that have never yet been observed.
Corbomite (symbol Ct) is a chemical element, atomic number 140 on the periodic table.
Astatine is a chemical element with the symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth's crust, occurring only as the decay product of various heavier elements. All of astatine's isotopes are short-lived; the most stable is astatine-210, with a half-life of 8.1 hours.
Untrioctium, Uto, is the temporary name for element 138. Isotopes are predicted in the bands 451Uto to 395Uto, 371Uto to 365Uto, and 359Uto. There may be isotopes in the band from the neutron dripline to 452Uto, but it is not possible to predict which ones are possible.
Unbiquadium, also known as element 124 or eka-uranium, is the hypothetical chemical element with atomic number 124 and placeholder symbol Ubq. Unbiquadium and Ubq are the temporary IUPAC name and symbol, respectively, until the element is discovered, confirmed, and a permanent name is decided upon.
Unbitrium (pronounced /ənˈbɪtriəm/) is the temporary name of an undiscovered chemical element in the periodic table that has the temporary symbol Ubt and has the atomic number 123.
Unbihexium, also known as element 126 or eka-plutonium, is the hypothetical chemical element with atomic number 126 and placeholder symbol Ubh.
Untrinilium, Utn, is the temporary name for element 130. Isotopes are predicted within the bands 438Utn to 375Utn, 369Utn to 355Utn, and 317Utn to 299Utn. There may be isotopes in the band from the neutron dripline to 439Utn, but it is not possible to predict which ones are possible.
fermium (Fm), synthetic chemical element of the actinoid series of the periodic table, atomic number 100.
As of April 2022, synthesis has been attempted for every element up to and including unbiseptium (Z = 127), except unbitrium (Z = 123), with the heaviest successfully synthesized element being oganesson in 2002 and the most recent discovery being that of tennessine in 2010.
Schrodium is the provisional non-systematic name of a theoretical element with the symbol So and atomic number 150. Schrodium was named in honor of Erwin Schrödinger (1887–1961), who developed his equation for quantum mechanics.
Unbiunium, also known as eka-actinium or element 121, is the hypothetical chemical element with symbol Ubu and atomic number 121. Unbiunium and Ubu are the temporary systematic IUPAC name and symbol respectively, which are used until the element is discovered, confirmed, and a permanent name is decided upon.
Element 120 would be located in main group 2A (group 2, alkaline earth metal), directly below radium (Ra).
Untripentium, Utp, is the temporary name for element 135. Isotopes are predicted in the bands 445Utp to 385Utp, 372Utp to 353Utp, and 319Utp to 316Utp. There may be isotopes in the band from the neutron dripline to 446Utp, but it is not possible to predict which ones are possible.
The term atomic number, conventionally denoted by the symbol Z, indicates number of protons present in the nucleus of an atom, which is also equal to the number of electrons in an uncharged atom. The number of neutrons is represented by the neutron number (N).
Promethium-146 | Pm | CID 177486 - PubChem.