 Thorium (source code)

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= Thorium
{title2=$\mathrm{Th}$}
{wiki}

<Thorium> is the <chemical element> with <atomic number> 90 and symbol $\mathrm{Th}$. It is a <actinide>. It has no stable <isotopes>, but thorium-232 is sufficiently long-lived to occur naturally. The $+4$ oxidation state is characteristic of its chemistry, distinguishing it from the more usual $+3$ chemistry of many neighboring f-block elements.<Periodic Table by Royal Society of Chemistry>[Thorium, element data and uses]{ref}

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