The ancient _____
first believed that all matter in the universe is made of tiny building blocks,
or atoms. In 1869, Russian chemist _____ Mendeleyev
proposed a chart of elements called the periodic table. In _____,
German scientist Wilhelm Conrad Roetgen announced the discovery of x-rays, which
can penetrate sheets of lead. In 1896, French physicist Antoine Henri Becquerel
found that certain substances, such as uranium salts, give off penetrating _____
of mysterious origin. Marie and Pierre _____ coined
the word radioactivity in 1898. In 1905, Albert _____
developed his mass-energy equation, E=mc2, as part of his special theory of relativity.
The British Roentgen Society adopted a resolution in 1915 to protect people from
overexposure to _____. In 1942, the Manhattan Project
is formed to secretly build the atomic _____ before
the Germans. Also in 1942, Italian-born American physicist _____
Fermi succeeded in producing the first nuclear chain reaction. In 1944, The first
large-scale nuclear reactor was built at Hanford, Washington, for the production
of nuclear _____ materials. In 1946, the Atomic _____
Act was passed, establishing the Atomic Energy Commission. In 1951, the first
_____ was generated by atomic power in Idaho Falls.
The Atomic Energy Act of 1954 is passed to promote the peaceful uses of nuclear
energy through private enterprises and to implement President Eisenhower’s
Atoms for _____ Program. In 1954, the first nuclear
submarine, U.S.S. _____, is launched. In 1955, Arco,
Idaho, becomes the first U.S. town to be powered by _____
energy. In 1979, _____ _____
Island nuclear power plant suffers hydrogen explosions and a partial core meltdown.
In 1986, _____ Nuclear Reactor meltdown and fire
occur in the Soviet Union releasing much radioactive material. In 1996, the United
Nations approves the Comprehensive Test Ban _____
which bans nuclear test explosions. In _____, an
accident at the uranium processing plant at Tokaimura, Japan, exposed fifty-five
works to radiation, and one worker later dies.
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