Seaborgium facts for kids

Kids Encyclopedia Facts


General properties
Name, symbol, number seaborgium, Sg, 106
Pronunciation Listeni/sˈbɔːrɡiəm/
Element category transition metal
Group, period, block 6, 7, d
Standard atomic weight [269] g/mol
Electron configuration [Rn] 5f14 6d4 7s2
Electrons per shell 2, 8, 18, 32, 32, 12, 2
(predicted) (Image)
Physical properties
Phase solid ((predicted))
Density (near r.t.) 35.0 (predicted) g/cm3
Atomic properties
Oxidation states 6, 5, 4, 3
(only bolded oxidation states are known experimentally)
Ionization energies
1st: 757.4 (estimated) kJ/mol
2nd: 1732.9 (estimated) kJ/mol
3rd: 2483.5 (estimated) kJ/mol
Atomic radius 132 (predicted) pm
Covalent radius 143 (estimated) pm
Crystal structure body-centered cubic
CAS registry number 54038-81-2
Most stable isotopes
Main article: Isotopes of seaborgium
iso NA half-life DM DE (MeV) DP
271Sg syn 1.9 min 67% α 8.54 267Rf
33% SF
269Sg syn 2.1 min α 8.56 265Rf
267Sg syn 1.4 min 17% α 8.20 263Rf
83% SF
265mSg syn 16.2 s α 8.70 261mRf
265Sg syn 8.9 s α 8.90, 8.84, 8.76 261Rf
only isotopes with half-lives over 5 seconds are included here

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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