362 | The History and Use of Our Earth’s Chemical Elements not long after the announcement of their discoveries, the publication Physical Review Letters
362 | The History and Use of Our Earth’s Chemical Elements not long after the announcement of their discoveries, the publication Physical Review Letters
received correspondence that announced the retraction of the discovery of these elements. This retraction was the result of the Berkeley team’s inability to reproduce the results. Since element 116 is part of the decay chain of element 118, its existence is also problematic. See the entry for element 118 for more detail on this issue.
CommonUses Since isotopes of element 116 may not have been produced, there are no uses for it.
ExamplesofCompounds None.
Hazards There is no hazard to the general public because of the scarcity or nonexistence of unun-
hexium’s isotopes, which are used only in nuclear laboratories. UNUNSEPTIUM( 117 UUS)
SYMBOL:Uus PERIOD:7 SERIESNAME:Superactinide ATOMICNO:117 ATOMICMASS:Unknown VALENCE:Unknown OXIDATIONSTATE:Unknown
NATURALSTATE:Expectedtobeasolidsilverymetal ORIGINOFNAME:UndertheIUPAC’stemporarysystem,itisassignedthename“unun- septium”(117). ISOTOPES:Notyetproduced.
ELECTRONCONFIGURATION EnergyLevels/Shells/Electrons Orbitals/Electrons
s2,p6
3-M=18
s2,p6,d10
4-N=32
s2,p6,d10,f14
5-O=32
s2,p6,d10,f14
6-P=18
s2,p6,d10
7-Q=7
s2,p5
PropertiesandCharacteristics Because element 117 (ununseptium) has not yet been produced, its properties are not
known. This does not hinder speculation as to what some of the properties and characteristics of 117 Uus will be when it is discovered and where it will fit into the scheme of what is known of elements 116 and 118—if they are confirmed. One thing that can be assumed with a high degree of probability is that Uus does not have a “magic number” of protons and neutrons, and thus is not included as one of the elements in the “island of stability.”
363 History
Guide to the Elements |
There is little history to report, except so far, its artificial production has not been reported. It is expected to be an extension of the halogens and will be located at the bottom of group 17(VIIA).
CommonUses None, except as a “place filler” between Z-116 and Z-118 in the periodic table. ExamplesofCompounds None. Hazards None, because it does not seem to exist. UNUNOCTIUM( 118 UUO) SYMBOL:Uuo PERIOD:7 SERIESNAME:Superactinide ATOMICNO:118
ATOMICMASS:Unknown VALENCE:Unknown OXIDATIONSTATE:Unknown NATU- RALSTATE:Expectedtobeagas ORIGINOFNAME:Ununoctium(118)followsthetemporarynamingsystemofIUPACfor elementsthathavenotyetreceivedpropernames. ISOTOPES:Noisotopesofununoctiumhaveyetbeenproduced.
ELECTRONCONFIGURATION EnergyLevels/Shells/Electrons Orbitals/Electrons
s2,p6
3-M=18
s2,p6,d10
4-N=32
s2,p6,d10,f14
5-O=32
s2,p6,d10,f14
6-P=18
s2,p6,d10
7-Q=8
s2,p6
PropertiesandCharacteristics Not only is ununoctium expected to be a gas, but it should also be a nonmetal when
discovered. It is located at the bottom of group 18 (VIIIA) in the periodic table and could
be expected to have some of the characteristics of it neighbors above it in this group. When first and erroneously reported as being discovered, it was said to have 118 protons and 175 neutrons in its nucleus for an atomic mass number (amu) of ˜293, which would make it the heaviest of the yet-to-be discovered elements.
Parts
» The History and Use of Our Earth's Chemical Elements: A Reference Guide, Second Edition
» Some Theoretical Atomic Models
» Fullerenes and Nanotechnology
» 48 | The History and Use of Our Earth’s Chemical Elements AbundanceandSource
» POTASSIUM SYMBOL:K PERIOD:3 GROUP:1(IA) ATOMICNO:19
» 58 | The History and Use of Our Earth’s Chemical Elements Characteristics
» 60 | The History and Use of Our Earth’s Chemical Elements
» 68 | The History and Use of Our Earth’s Chemical Elements History
» 74 | The History and Use of Our Earth’s Chemical Elements Characteristics
» 82 | The History and Use of Our Earth’s Chemical Elements Properties
» 92 | The History and Use of Our Earth’s Chemical Elements CommonUses
» 94 | The History and Use of Our Earth’s Chemical Elements AbundanceandSource
» 96 | The History and Use of Our Earth’s Chemical Elements Properties
» 98 | The History and Use of Our Earth’s Chemical Elements
» 112 | The History and Use of Our Earth’s Chemical Elements Characteristics
» 120 | The History and Use of Our Earth’s Chemical Elements Properties
» 128 | The History and Use of Our Earth’s Chemical Elements Properties
» 138 | The History and Use of Our Earth’s Chemical Elements
» 142 | The History and Use of Our Earth’s Chemical Elements CommonUses
» 144 | The History and Use of Our Earth’s Chemical Elements Properties
» 156 | The History and Use of Our Earth’s Chemical Elements Properties
» 158 | The History and Use of Our Earth’s Chemical Elements
» 162 | The History and Use of Our Earth’s Chemical Elements
» 168 | The History and Use of Our Earth’s Chemical Elements Hazards
» 176 | The History and Use of Our Earth’s Chemical Elements Properties
» 182 | The History and Use of Our Earth’s Chemical Elements Properties
» 184 | The History and Use of Our Earth’s Chemical Elements Hazards
» CARBON SYMBOL:C PERIOD:2 GROUP:14(IVA) ATOMICNO:6
» 200 | The History and Use of Our Earth’s Chemical Elements ExamplesofCompounds
» NITROGEN SYMBOL:N PERIOD:2 GROUP:15(VA) ATOMICNO:7
» PHOSPHORUS SYMBOL:P PERIOD:3 GROUP:15(VA) ATOMICNO:15
» 218 | The History and Use of Our Earth’s Chemical Elements
» 220 | The History and Use of Our Earth’s Chemical Elements ExamplesofCompounds
» OXYGEN SYMBOL:O PERIOD:2 GROUP:16(VIA) ATOMICNO:8
» 226 | The History and Use of Our Earth’s Chemical Elements AbundanceandSource
» SULFUR SYMBOL:S PERIOD:3 GROUP:16(VIA) ATOMICNO:16
» 236 | The History and Use of Our Earth’s Chemical Elements CommonUses
» 242 | The History and Use of Our Earth’s Chemical Elements Properties
» FLUORINE SYMBOL:F PERIOD:2 GROUP:17(VIIA) ATOMICNO:9
» IODINE SYMBOL:I PERIOD:5 GROUP:17 ATOMICNO:53
» 256 | The History and Use of Our Earth’s Chemical Elements CommonUses
» 258 | The History and Use of Our Earth’s Chemical Elements Properties
» 262 | The History and Use of Our Earth’s Chemical Elements
» 266 | The History and Use of Our Earth’s Chemical Elements Properties
» 268 | The History and Use of Our Earth’s Chemical Elements AbundanceandSource
» 278 | The History and Use of Our Earth’s Chemical Elements Properties
» 284 | The History and Use of Our Earth’s Chemical Elements Properties
» 298 | The History and Use of Our Earth’s Chemical Elements Properties
» 300 | The History and Use of Our Earth’s Chemical Elements AbundanceandSource
» 308 | The History and Use of Our Earth’s Chemical Elements Characteristics
» 310 | The History and Use of Our Earth’s Chemical Elements AbundanceandSource
» 316 | The History and Use of Our Earth’s Chemical Elements Hazards
» 320 | The History and Use of Our Earth’s Chemical Elements History
» 322 | The History and Use of Our Earth’s Chemical Elements AbundanceandSource
» 332 | The History and Use of Our Earth’s Chemical Elements Hazards
» 336 | The History and Use of Our Earth’s Chemical Elements Properties
» 352 | The History and Use of Our Earth’s Chemical Elements ExamplesofCompounds
» 364 | The History and Use of Our Earth’s Chemical Elements History
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