General science

General science

A variety of science subjects concerning the fundamental knowledge about different aspects of our world and their underlying principles.

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General science

americium

Science; General science

A chemical element, symbol Am, atomic number 95. The isotope 241 Am is an alpha emitter with a half-life of 433 years. Other isotopes of americium range in mass from 232 to 247, but only the ...

A chemical element, symbol As, atomic number 33. Arsenic is found widely distributed in nature (approximately 5 × 10 −4 of the Earth's crust). It is one of the 22 known elements composed of only one ...

bohrium

Science; General science

A chemical element, symbol Bh, atomic number 107. Bohrium was synthesized and identified in 1981 by using the Universal Linear Accelerator (UNILAC) of the Gesellschaft für Schwerionenforschung (GSI) ...

dubnium

Science; General science

A chemical element, symbol Db, atomic number 105. It was synthesized and identified unambiguously in March 1970 at the heavy-ion linear accelerator (HILAC) at the Lawrence Radiation Laboratory, ...

hassium

Science; General science

A chemical element, symbol Hs, atomic number 108. It was synthesized and identified in 1984 by using the Universal Linear Accelerator (UNILAC) at Darmstadt, West Germany, by the same team (led by P. ...

lawrencium

Science; General science

A chemical element, symbol Lr, atomic number 103. Lawrencium, named after E. O. Lawrence, is the eleventh transuranium element; it completes the actinide series of elements.

sodium

Science; General science

A chemical element, symbol Na, atomic number 11, and atomic weight 22.9898. Sodium is between lithium and potassium in group I of the periodic table. The element is a soft, reactive, low-melting ...