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Leuna

(Encyclopedia)Leuna loiˈnä [key], city (1994 pop. 8,130), Saxony-Anhalt, S central Germany. There, in 1916, the first synthetic nitrogen plant began to operate after the invention of the Haber process. The city w...

Mv

(Encyclopedia)Mv, former symbol of the element mendelevium, now Md. ...

Lw

(Encyclopedia)Lw, former symbol of the element lawrencium, now Lr. ...

determinant

(Encyclopedia)determinant, a polynomial expression that is inherent in the entries of a square matrix. The size n of the square matrix, as determined from the number of entries in any row or column, is called the o...

Bronze Age

(Encyclopedia)Bronze Age, period in the development of technology when metals were first used regularly in the manufacture of tools and weapons. Pure copper and bronze, an alloy of copper and tin, were used indiscr...

Bergman, Torbern Olof

(Encyclopedia)Bergman, Torbern Olof to͝orˈbərn o͞oˈlôv bĕrˈyəmän [key], 1735–84, Swedish chemist, physicist, and mineralogist. A professor at the Univ. of Uppsala from 1758, he developed a theory of che...

Jl

(Encyclopedia)Jl, formerly the suggested symbol for the element joliotium, now called dubnium. ...

Ku

(Encyclopedia)Ku, formerly the suggested symbol for the element kurchatovium, now called rutherfordium. ...

Cb

(Encyclopedia)Cb, formerly the symbol for the element columbium, now called niobium (Nb). ...

Carteret

(Encyclopedia)Carteret, borough (2020 pop. 25,326), Middlesex co., NE N.J., on Arthur Kill, opposite Staten Island; inc. 1906. It has oil and copper refineries and in...