NEET 2021 Physics and Chemistry

● Actinoids are highly reactive metals, especially when finely divided
● Actinoid contraction is greater from element to element than lanthanoid contraction resulting from poor shielding by 5f electrons
● Many trivalent lanthanoids ions are coloured both in the solid state and in aqueous solutions.
● Lanthanoids have typical metallic structure and are good conductors of heat and electricity