Topic: actinide series


actinide series. Wikimedia Commons (Public Domain)
Related images
Rate these images

actinide series

The Columbia Encyclopedia, Sixth Edition
actinide series a series of radioactive metallic elements in Group 3 of the periodic table . Members of the series are often called actinides, although actinium (at. no. 89) is not always considered a member of the series. The series always includes the 14 elements with atomic numbers 90 through 103. The other members are (in order of increasing atomic number) thorium , protactinium , uranium , neptunium , plutonium , americium , curium , berkelium , californium , einsteinium , fermium , mendelevium , nobelium , and lawrencium . Thorium and uranium... Read more
actinide series
World Encyclopedia actinide series Group of radioactive elements with similar chemical properties. Their atomic ... from 89 to 103. Each element is analogous to the corresponding lanthanide series (rare-earth metals). Those having atomic numbers greater than 92 (uranium ... Read more
actinide
Britannica Concise Encyclopedia Any of the series of 15 consecutive chemical element s in the ... unstable and are produced only artificially. Actinides are transition element s, so their atom s ... behaviour; the most usual valence s are 3 and 4. actinide actinide actinide Read more

See all related entries >

Related topics