Question

Distinguish between lanthanides and actinides.

Hint:

The key difference is that lanthanides are less radioactive and mainly have a +3 oxidation state, whereas actinides are highly radioactive and can have multiple oxidation states.

Answer 1

The lanthanides and actinides are two series of elements found in the periodic table. Below is the distinction between them: 1. Lanthanides: - Lanthanides are elements with atomic numbers from 57 to 71 (from Lanthanum to Lutetium). - They are also known as rare earth elements. - They are f-block elements and are located in the 4f orbital. - Lanthanides have a typical oxidation state of +3. - They are less radioactive compared to actinides. - Lanthanides are commonly used in catalysts, phosphors, and magnets. 2. Actinides: - Actinides are elements with atomic numbers from 89 to 103 (from Actinium to Lawrencium). - They are also f-block elements but are located in the 5f orbital. - Actinides are radioactive and most of them are unstable. - They commonly exhibit a wide range of oxidation states, with +3, +4, and +6 being common. - Actinides are important in nuclear energy applications, such as Uranium and Plutonium.