= Actinide
An <actinide> is an element in the series from <actinium>, <atomic number> 89, through <lawrencium>, <atomic number> 103. The series is associated with occupation of 5f-derived electronic states, although individual ground-state configurations vary.
Variable <oxidation> states and ionic sizes affect coordination and separation chemistry. Radioactive <isotopes> add a distinct nuclear aspect to applications involving <nuclear fuel> and waste materials.
<Periodic Table by Royal Society of Chemistry>[Actinium through lawrencium, atomic numbers89–103; element properties]{ref}
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