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Seaborgium facts for kids

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Seaborgium, 106Sg
Seaborgium
Pronunciation Listeni/sˈbɔːrɡiəm/ (see-BOR-gee-əm)
Mass number 269
Seaborgium in the periodic table
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
W

Sg

(Uhn)
dubniumseaborgiumbohrium
Atomic number (Z) 106
Group group 6
Period period 7
Block   d
Electron configuration [Rn] 5f14 6d4 7s2
Electrons per shell 2, 8, 18, 32, 32, 12, 2
Physical properties
Phase at STP solid (predicted)
Density (near r.t.) 35.0 g/cm3 (predicted)
Atomic properties
Oxidation states 0, (+3), (+4), (+5), +6 (parenthesized: prediction)
Ionization energies
  • 1st: 757 kJ/mol
  • 2nd: 1733 kJ/mol
  • 3rd: 2484 kJ/mol
  • (more) (all but first estimated)
Atomic radius empirical: 132 pm (predicted)
Covalent radius 143 pm (estimated)
Other properties
Natural occurrence synthetic
Crystal structure body-centered cubic (bcc)
Body-centered cubic crystal structure for seaborgium

(predicted)
CAS Number 54038-81-2
History
Naming after Glenn T. Seaborg
Discovery Lawrence Berkeley National Laboratory (1974)
Main isotopes of seaborgium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
265Sg syn 8.9 s α 261Rf
265mSg syn 16.2 s α 261mRf
267Sg syn 1.4 min 17% α 263Rf
83% SF
269Sg syn 14 min α 265Rf
271Sg syn 1.6 min 67% α 267Rf
33% SF

Seaborgium is a chemical element. In the past, it has been named eka-tungsten but is now named seaborgium. It has the symbol Sg. It has the atomic number 106. Seaborgium is a radioactive element that does not exist in nature. It has to be made. The most stable isotope is 271Sg. Seaborgium-271 has a half-life of 2.4 minutes.

What Seaborgium looks like is not known because not enough has been made to see it with human eyesight, but since it is in the same period as Tungsten in the periodic table, it's appearance and may be similar to such.

The element is named in honor of Glenn Seaborg.

Seaborgium is a transuranium element. This means that it is "beyond" (trans) the element Uranium in the sequence of elements.

Mendeleev predicted that Seaborgium would exist. He called the element eka-tungsten because of its location was near Tungsten in the Periodic Table. The chemistry of seaborgium is like the chemistry of tungsten.

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