Reference Terms
from Wikipedia, the free encyclopedia
Actinide
The actinide series encompasses the 15 chemical elements that lie between actinium and lawrencium on the periodic table with atomic numbers 89 - 103.
Note: The above text is excerpted from the Wikipedia article "Actinide", which has been released under the GNU Free Documentation License.
Related Stories
1
2
Science News
April 16, 2025
Apr. 16, 2025 — A study suggests that Homo sapiens may have benefited from the use of ochre and tailored clothing during a period of increased UV light 41,000 years ago, during the Laschamps ...
Apr. 16, 2025 — Astronomers have found a planet that orbits at an angle of 90 degrees around a rare pair of peculiar stars. This is the first time we have strong evidence for one of these 'polar planets' orbiting a ...
Apr. 16, 2025 — A new study analyzing data from NASA's Perseverance rover has uncovered compelling evidence of multiple mineral-forming events just beneath the Martian surface -- findings that bring scientists one step closer to answering the profound question: Did ...
Apr. 16, 2025 — Researchers have helped overturn the popular theory that water on Earth originated from asteroids bombarding its surface; Scientists have analyzed a meteorite analogous to the early Earth to ...
Latest Headlines
updated 12:56 pm ET
Apr. 16, 2025 — A new study has identified a novel strategy for treating acute myelogenous leukemia (AML), an aggressive blood cancer for which the median survival time following diagnosis remains just 8.5 ...
Apr. 16, 2025 — Crime scene investigation may soon become significantly more accurate and efficient thanks to a new method for detecting gunshot residues. ...
Apr. 15, 2025 — In birds, singing behaviors play a critical role in mating and territory defense. Although birdsong can signal individual quality and personality, ...
Apr. 15, 2025 — Researchers have identified the key brain regions that are essential for logical thinking and problem ...
Apr. 15, 2025 — Certain common genetic changes might make some people with focal epilepsy less responsive to seizure medications, finds a new global ...
Apr. 16, 2025 — A new study suggests the universe may rotate -- just extremely slowly. The finding could help solve one of astronomy's biggest ...
Apr. 16, 2025 — Researchers developed a machine-learning-guided technique to solve complex, long-horizon planning problems more efficiently than some traditional approaches, while arriving at an optimal solution ...
Apr. 16, 2025 — A recently created RoboBee is now outfitted with its most reliable landing gear to date, inspired by one of nature's most graceful landers: the crane fly. The team has given their flying robot a set ...
Apr. 16, 2025 — Mycobacteria are the world's most deadly bacteria --c ausing infectious diseases including tuberculosis (TB), which alone kills more than one million people each year. New drugs to fight these ...
Apr. 16, 2025 — Why does dementia affect more women than men? To help solve this mystery, researchers uncovered a new risk factor: age of menopause ...