Question

Write any two properties of actinides.

Answer 1

Properties of actinides:

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