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stibnite

(Encyclopedia)stibnite stĭbˈnīt [key], antimony sulfide, Sb2S3, a mineral, silvery gray in color, with a metallic luster. It crystallizes in the orthorhombic system. Found in many parts of the world, it is the m...

Sb

(Encyclopedia)Sb, symbol for the element antimony. ...

potassium

(Encyclopedia)potassium pətăsˈēəm [key], a metallic chemical element; symbol K [Lat. kalium=alkali]; at. no. 19; at. wt. 39.0983; m.p. 63.25℃; b.p. 760℃; sp. gr. .862 at 20℃; valence +1. Potassium is a s...

Dynasties of Ancient Egypt (table)

(Encyclopedia)Dynasties of Ancient Egypt Old Kingdom (or Old Empire) First Intermediate Period Middle Kingdom (or Middle Empire) Second Intermediate Period New Kingdom (or New Empire) ...

Examples of Systematic Classification (table)

(Encyclopedia)Examples of Systematic Classification ...

hafnium

(Encyclopedia)hafnium hăfˈnēəm [key], metallic chemical element; symbol Hf; at. no. 72; at. wt. 178.49; m.p. about 2,227℃; b.p. 4,602℃; sp. gr. 13.31 at 20℃; valence +4. Hafnium is a lustrous, ductile, si...

Text of the Constitution of the United States

(Encyclopedia)Text1 of the Constitution of the United States Preamble Article I Article II Article III Article IV Article V Article VI Article VII Amendment I Amendment II Am...

Constellations (table)

(Encyclopedia)Constellations 1 Zodiac constellation. ...

water table

(Encyclopedia)water table, the top zone of soil and rock in which all voids are saturated with water. The level of the water table varies with topography and climate, and depends on the degree to which the groundwa...

Table Bay

(Encyclopedia)Table Bay, inlet of the Atlantic Ocean, 6 mi (9.7 km) wide, lying off Western Cape, South Africa. Table Mt. overlooks the bay, which was visited in the late 15th cent. by Portuguese voyagers to India....