If an atom loses one of these, it becomes a cation, a positively charged ion
On Oct. 15, 2003 it became the third country to launch a man into space; the Shenzhou 5 spacecraft orbited the Earth 14 times
The tokamak, this type of nuclear reactor, uses plasma heated to 180 million degrees as fuel
(Cheryl of the Clue Crew at the Eli Whitney Museum in New Haven, Connecticut) In the 1940s, Dr. William Sewell created an artificial one of these, using parts from an erector set
In 1901 Eugene Demarcay discovered Eu, this rare-earth metal that's named for a continent
This biologist first gained acclaim for writing in1937 with her article "Undersea" in the Atlantic Monthly
Social insects, termites live in groups of a few hundred to several million called these
The Cassini spacecraft is scheduled to study this planet & send a probe to the surface of its moon Titan
Dioxide of this element, symbol Cr, is used to make recording tape for cassettes
The name of this pivoted frame for the combustion chamber & nozzle of a rocket sounds like Macy's one-time rival