actinide
Noun
Meaning
any of a series of radioactive elements with atomic numbers 89 through 103
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Actinide ferromagnets A number of actinide compounds are ferromagnets at room temperature or exhibit ferromagnetism upon cooling.
A key need is application of actinide solid solutions in durable crystalline host phases.
Click here for more information. main infobox Fermium is a synthetic element with symbol Fm and atomic number 100. It is a member of the actinide series.
Characteristics Physical properties Californium is a silvery white actinide metalsfn with a melting point of convert and an estimated boiling point of convert.sfn The pure metal is malleable and is easily cut with a razor blade.
All but one of the actinides are f-block elements, corresponding to the filling of the 5f electron shell ; lawrencium, a d-block element, is also generally considered an actinide.
Also, a common presentation is to put all 15 lanthanide and actinide columns below, while the f-block only has 14 columns.