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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...

Necho 609–593 b.c., king of ancient, Egypt

(Encyclopedia)Necho nēˈkō [key], 609–593 b.c., king of ancient Egypt, 2d ruler of the XXVI dynasty, the son and successor of Psamtik and grandson of Necho, lord of Saïs. Necho took advantage of the confusion ...

Mahabalipuram

(Encyclopedia)Mahabalipuram məhäˈbəlĭpo͝orəm [key], town, Tamil Nadu state, SE India, a coastal resort on the Coromandel Coast. Archaeological remains there represent some of the earliest-known examples of D...

Halifax, George Savile, 1st marquess of

(Encyclopedia)Halifax, George Savile, 1st marquess of, 1633–95, English statesman. A protégé of the 2d duke of Buckingham, he was made Viscount Halifax (1668) and sat (1672–76) in the privy council. An oppone...

saxophone

(Encyclopedia)saxophone, musical instrument invented in the 1840s by Adolphe Sax. Although it uses the single reed of the clarinet family, it has a conical tube and is made of metal. By 1846 there was a double fami...

virtue

(Encyclopedia)virtue [Lat.,=manliness], in philosophy, quality of good in human conduct. The cardinal virtues, as presented by Plato, were wisdom (or prudence), courage, temperance, and justice. They are to be inte...

Rulers of France since 987 (table)

(Encyclopedia)Rulers of France since 987(including dates of reign) The Capetians House of Valois House of Bourbon The First Republic The First Empire Bourbon Restoration House of Bourbon-Orléans T...

Polish language

(Encyclopedia)Polish language, member of the West Slavic group of the Slavic subfamily of the Indo-European family of languages (see Slavic languages). Polish is spoken as a first language by about 38 million peopl...

week

(Encyclopedia)week, period of time shorter than the month, commonly seven days. The ancient Egyptians used a 10-day period, as did the French under the short-lived French Revolutionary calendar. In many regions a f...

actinium

(Encyclopedia)actinium ăktĭnˈēəm [key] [Gr.,=like a ray], radioactive chemical element; symbol Ac; at. no. 89; mass number of most stable isotope 227; m.p. about 1,050℃; b.p. 3,200℃±300℃; sp. gr. 10.07;...