The New book of knowledge, Volum 11An illustrated encyclopedia containing over 9,000 articles on history, literature, art and music, geography, myths and legends, mathematics, science, hobbies, holidays and festivals, games, sports, crafts, medicine, law, government, industry, politics, and other topics. |
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Side 159
Each set was given a different name. The first begins with lanthanum; it is the
lantha- nide series of elements. The second set begins with actinium; it is the
actinide series. In one case a similarity runs diagonally (at an angle) across the
table.
Each set was given a different name. The first begins with lanthanum; it is the
lantha- nide series of elements. The second set begins with actinium; it is the
actinide series. In one case a similarity runs diagonally (at an angle) across the
table.
Side 161
DYSPROSIUM: A metal of the lanthanide series. EINSTEINIUM: A man-made,
radioactive metal of the actinide series; does not occur in nature. ELEMENTS 106
, 107, 109: Each is a man- made, radioactive element, which does not occur in ...
DYSPROSIUM: A metal of the lanthanide series. EINSTEINIUM: A man-made,
radioactive metal of the actinide series; does not occur in nature. ELEMENTS 106
, 107, 109: Each is a man- made, radioactive element, which does not occur in ...
Side 164
PROMETHIUM: A man-made, radioactive metal of the lanthanide series; also
found to occur in certain stars. PROTACTINIUM: A radioactive metal of the
actinide series: found in small quantities in uranium ores. RADIUM: A white,
radioactive ...
PROMETHIUM: A man-made, radioactive metal of the lanthanide series; also
found to occur in certain stars. PROTACTINIUM: A radioactive metal of the
actinide series: found in small quantities in uranium ores. RADIUM: A white,
radioactive ...
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