Practicing Success
Case: Read the passage and answer the following questions The f-block consists of the two series, lanthanoids (the fourteen elements following lanthanum) and actinoids (the fourteen elements following actinium). . Because actinium closely resembles the actinoids, it is usually included in any discussion of the actinoids for which the general symbol An is often used. The chemistry of actinoids is complex. The complication arises partly owing to the occurrence of a wide range of oxidation states in these elements and partly because their radioactivity creates special problems in their study. |
Which property of actinoids cannot be explained? |
Magnetic Oxidation Radioactive Basic |
Magnetic |
Their magnetic properties cannot be explained easily, as they are more complex. The 5f bands formed due to 5f-5f wave function overlap or to hybridisation with s, p or d electrons. As a result of the band formation, a wide variety of magnetic phenomena may occur. |