106Sg

Seaborgium

Transition metalunknownblock d

The first element named for a person still living at the time, honouring Glenn Seaborg, who had already co-discovered ten elements before it.

Atomic number	106
Mass number (longest-lived isotope)	269 g/mol
This element has no stable isotope, so it has no standard atomic weight. The figure above is the mass number of its longest-lived isotope — a convention, not a measurement of a natural mixture.
Group · period	6 · 7
Electron configuration	[Rn] 5f¹⁴ 6d⁴ 7s²

About Seaborgium

IUPAC initially rejected seaborgium on the grounds that no element had ever been named for a living person, then reversed itself in 1997 after the American Chemical Society objected — pointing out among other things that einsteinium had been named while Einstein was alive, just secretly. Seaborg took quiet pleasure in being able to receive mail addressed in chemical symbols. He earned it: he co-discovered plutonium through nobelium, and his 1944 actinide concept, which relocated an entire block of the table, was the insight that made the transuranics findable at all. Gas-phase work in 1997 produced SgO₂Cl₂ and confirmed group 6 behaviour, molybdenum and tungsten's chemistry surviving 106 protons.

Use 269 g/mol in these solvers

Moles from Mass (n = m/M)

n = \frac{m}{M}

Opens with M = 269 g/mol already filled in

Gas Density from Molar Mass

\rho = \frac{PM}{RT}

Opens with M = 269 g/mol already filled in

Faraday's Law of Electrolysis (m = QM/nF)

m = \frac{Q M}{n F}

Opens with M = 269 g/mol already filled in

Ion Concentration as CaCO₃ Equivalent

C_{\mathrm{CaCO_3}} = C_{\mathrm{ion}} \times \frac{50.04}{\mathrm{EW}}

Opens with EW = 269 g/mol already filled in

Acid Feed to Reduce Alkalinity

\dot m = \frac{\Delta \mathrm{Alk} \, Q \times \frac{\mathrm{EW}}{50.04}}{p/100\%}

Opens with EW = 269 g/mol already filled in

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