Chemistry · Ch 8 — Transition and Inner Transition Elements

Properties of Actinoids

8.15

i. Similar to lanthanoids, they appear silvery white in colour.
ii. These are highly reactive radioactive elements
iii. They experience a decrease in the atomic and ionic radii from actinium (Ac) to lawrencium (Lr), known as actinoid contraction
iv. They usually exhibit the +3 oxidation state. Elements of the first half of the series usually exhibit higher oxidation states. …