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salt, chemical compound

(Encyclopedia)salt, chemical compound (other than water) formed by a chemical reaction between an acid and a base (see acids and bases). Salts are also prepared by methods other than neutralization. A metal can c...

Chihuahua, state, Mexico

(Encyclopedia)Chihuahua chēwäˈwä [key], state, 94,831 sq mi (245,612 sq km), N Mexico, on the border of ...

Tasmania

(Encyclopedia)Tasmania tăzmāˈnēə [key], island state (2016 pop. 509,965), 26,383 sq mi (68,332 sq km), SE Commonwealth of Australia. It is separated from Australia by the Bass Strait and lies 150 mi (240 km) s...

Qinghai

(Encyclopedia)Qinghai or Tsinghai both: chĭngˈhīˈ [key], province (2010 pop. 5,626,722), c.279,000 sq mi (722,797 sq km), W China. Xining is the capital. Qinghai lies in the Tibetan highlands at an average elev...

Ordovician period

(Encyclopedia)Ordovician period ôrdəvĭshˈən [key] [from the Ordovices, ancient tribe of N Wales], second period of the Paleozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table) fr...

Liaoning

(Encyclopedia)Liaoning lyouˈnĭngˈ [key], province (2010 pop. 43,746,323), c.58,400 sq mi (151,295 sq km), NE China, on the Bohai and Korea Bay. The capital is Shenyang (Mukden). A part of Manchuria, it encompass...

Karelia

(Encyclopedia)Karelia kərēˈlēə [key], constituent republic (1990 pop. 800,000), 66,409 sq mi (172,300 sq km), NW European Russia, extending from the Finnish border in the west to the White Sea in the east and ...

sulfate

(Encyclopedia)sulfate, chemical compound containing the sulfate (SO4) radical. Sulfates are salts or esters of sulfuric acid, H2SO4, formed by replacing one or both of the hydrogens with a metal (e.g., sodium) or a...

superconductivity

(Encyclopedia)superconductivity, abnormally high electrical conductivity of certain substances. The phenomenon was discovered in 1911 by Heike Kamerlingh Onnes, who found that the resistance of mercury dropped sudd...

Shan State

(Encyclopedia)Shan State shän [key], state (1983 pop. 3,718,706), c.60,000 sq mi (155,400 sq km), E central Myanmar. Taunggyi, the capital, and Lashio are its principal cities. It borders on China in the north, La...