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Russian and Soviet Rulers since 1462 (table)

(Encyclopedia) Russian and Soviet Rulers since 1462(including dates of rule) House of Rurik House of Godunov Usurpers House of Romanov Provisional Government(premiers) Soviet Russia (1917–22) and the U...

scandium

(Encyclopedia)scandium skănˈdēəm [key], metallic chemical element; symbol Sc; at. no. 21; at. wt. 44.95591; m.p. 1,541℃; b.p. 2,831℃; sp. gr. 2.99 at 20℃; valence +3. Scandium is a soft silver-white metal...

gallium

(Encyclopedia)gallium gălˈēəm [key], metallic chemical element; symbol Ga; at. no. 31; at. wt. 69.723; m.p. 29.78℃; b.p. 2,403℃; sp. gr. 5.904 at 29.6℃ (solid), 6.095 at 29.8℃ (liquid); valence +2 or +3...

rhenium

(Encyclopedia)rhenium rēˈnēəm [key], metallic chemical element; symbol Re; at. no. 75; at. wt. 186.207; m.p. about 3,180℃; b.p. about 5,625℃; sp. gr. 21.02 at 20℃; valence −1, +2, +3, +4, +5, +6, or +7....

Ivan IV

(Encyclopedia)Ivan IV or Ivan the Terrible, 1530–84, grand duke of Moscow (1533–84), the first Russian ruler to assume formally the title of czar. In his later years, Ivan's character, always stern, grew tyra...

periodic table

(Encyclopedia) CE5 periodic table, chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. J. Moseley. In the periodic table the elements are arrange...

germanium

(Encyclopedia)germanium jərmāˈnēəm [key] [from Germany], semimetallic chemical element; symbol Ge; at. no. 32; at. wt. 72.63; m.p. 937.4℃; b.p. 2,830℃; sp. gr. 5.323 at 25℃; valence +2 or +4. Pure german...

Rostov-na-Donu

(Encyclopedia)Rostov-na-Donu rŏˈstŏv, Rus. rəstôfˈ [key], city (1989 pop. 1,019,000), capital of Rostov region and the administrative center of the Southern federal district, SE European Russia, on the Don Ri...

Rasputin, Grigori Yefimovich

(Encyclopedia)Rasputin, Grigori Yefimovich răspyo͞oˈtĭn, Rus. grĭgôˈrē yĭfēˈməvĭch rəspo͞oˈtyĭn [key], 1869–1916, Russian holy man and courtier, a notorious figure at the court of Czar Nicholas I...

Golden Horde, Empire of the

(Encyclopedia) CE5 Khanate of the Golden Horde (c.1300) Golden Horde, Empire of the, Mongol state comprising most of Russia, given as an appanage to Jenghiz Khan's oldest son, Juchi, and actually conquered and f...
 

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