8.43 Compare the chemistry of the actinoids with that of lanthanoids with reference to: (i) electronic configuration (ii) oxidation states and (iii) chemical reactivity.

<p><strong>8.43&nbsp;</strong></p><table><tbody><tr><td><p><strong>Lanthanoids</strong></p></td><td><p><strong>&nbsp;</strong></p><p><strong>Actinoids</strong></p></td></tr><tr><td><p>1.The electronic configuration of lanthanoids is [Xe]⁵⁴ 4f^1-14</p></td><td><p>1.The electronic configuration of actinoids is [Rn]86 5f1-14 6d0-1 7s2</p></td></tr><tr><td><p>2. They show limited oxidation states (+2, +3, 4) out of which +3 is most common. This is because of the large energy gap between 4f and 5d subshells.</p></td><td><p>2. Actinoids show a large number of oxidation states (+3, +4, +5, +6, +7) because of the small energy gap between 5f, 6d, and 7s subshells.</p></td></tr><tr><td><p>3. The first few members of the series are quite reactive, almost like calcium with increasing atomic no. their behaviour becomes similar to that of aluminium</p></td><td><p>3.They are highly reactive metals especially in the finely divided state. When they are added to boiling water they give a mixture of oxide and hydride.</p></td></tr></tbody></table>

0 Upvotes 0 Upvotes 0 Downvotes

• • Report Abuse
• Comment