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Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.
Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. [1] [2] Modern science is typically divided into two or three major branches: [3] the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; and the social sciences (e.g., economics, psychology, and sociology), which ...
The concept of magic numbers in the field of chemistry refers to a specific property (such as stability) for only certain representatives among a distribution of structures. It was first recognized by inspecting the intensity of mass-spectrometric signals of rare gas cluster ions. [1] Then, the same effect was observed with sodium clusters. [2] [3]
Knowledge is a form of familiarity, awareness, understanding, or acquaintance.It often involves the possession of information learned through experience [1] and can be understood as a cognitive success or an epistemic contact with reality, like making a discovery. [2]
Popular live action TV shows include The Borrowers (based on Mary Norton books on little people), The Adventures of Black Beauty, The Famous Five (based on Enid Blyton books), The Lion, the Witch and the Wardrobe (based on the C. S. Lewis novel), and Pride and Prejudice (starring Colin Firth as Mr. Darcy).
Human impact on the environment. From top left, clockwise: satellite image of Southeast Asian haze; IAEA experts investigate the Fukushima disaster; a seabird during an oil spill; depiction of deforestation of Brazil's Atlantic forest by Portuguese settlers, c. 1820 –25; acid mine drainage in the Rio Tinto; industrial fishing in 1997, a practice that has led to overfishing.
The practice of eating invasive species to reduce their populations has been explored. In 2005 Chef Bun Lai of Miya's Sushi in New Haven, Connecticut created the first menu dedicated to invasive species. At that time, half the items on the menu were conceptual because those invasive species were not yet commercially available. [161]
Cornell University was founded on 27 April 1865, by Ezra Cornell, an entrepreneur and New York State Senator, and Andrew Dickson White, an educator and also a New York State Senator, after the New York State legislature authorized the university as the state's land grant institution. [19]