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You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
The periodic table is a tabular arrangement of the chemical elements, organized by their atomic number, electron configuration, and chemical properties. It is a useful tool for understanding the patterns and trends of the elements and their interactions. Learn more about the history, structure, and significance of the periodic table on Wikipedia.
Chemistry education. Children mix chemicals in test tubes as part of a hands-on chemistry education program in Samara, Russia. 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 ]
Line (poetry) A line is a unit of writing into which a poem or play is divided: literally, a single row of text. The use of a line operates on principles which are distinct from and not necessarily coincident with grammatical structures, such as the sentence or single clauses in sentences. Although the word for a single poetic line is verse ...
List of chemical elements. 118 chemical elements have been identified and named officially by IUPAC. A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z ). [ 1]
t. e. In the curriculum of the Waldorf schools, much of the education in academic subjects takes place in blocks, usually of 3–5 weeks duration. Each pupil generally writes and illustrates a self-created textbook representing the material learned in the block. [1] These blocks are supported by on-going classes in subjects such as music, art ...
Literature portal. v. t. e. Poetry (from the Greek word poiesis, "making") is a form of literary art that uses aesthetic and often rhythmic [ 1][ 2][ 3] qualities of language to evoke meanings in addition to, or in place of, literal or surface-level meanings. Any particular instance of poetry is called a poem and is written by a poet.