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The World of Chemistry is a television series on introductory chemistry hosted by Nobel Prize-winning chemist Roald Hoffmann.The series consists of 26 half-hour video programs, along with coordinated books, which explore various topics in chemistry through experiments conducted by Stevens Point emeritus professor Don Showalter the "series demonstrator" [1] and interviews with working chemists ...
[6] [7] [8] Quizlet's blog, written mostly by Andrew in the earlier days of the company, claims it had reached 50,000 registered users in 252 days online. [9] In the following two years, Quizlet reached its 1,000,000th registered user. [10] Until 2011, Quizlet shared staff and financial resources with the Collectors Weekly website. [11]
As of 2024, there are 57 sovereign states and 28 non-sovereign entities where English is an official language. Many administrative divisions have declared English an official language at the local or regional level. Most states where English is an official language are former territories of the British Empire.
Chemistry education (or chemical education) is the study of teaching and learning chemistry. It is one subset of STEM education or discipline-based education research (DBER). [1] Topics in chemistry education include understanding how students learn chemistry and determining the most efficient methods to teach chemistry.
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.
The English-speaking world comprises the 88 countries and territories in which English is an official, administrative, or cultural language. In the early 2000s, between one and two billion people spoke English, [1] [2] making it the largest language by number of speakers, the third largest language by number of native speakers and the most widespread language geographically.
This is a list of languages by number of native speakers.. Current distribution of human language families. All such rankings of human languages ranked by their number of native speakers should be used with caution, because it is not possible to devise a coherent set of linguistic criteria for distinguishing languages in a dialect continuum. [1]
The language family of the world that has the most speakers is the Indo-European languages, spoken by 46% of the world's population. [137] This family includes major world languages like English, Spanish, French, German, Russian, and Hindustani (Hindi/Urdu).