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  2. Topic sentence - Wikipedia

    en.wikipedia.org/wiki/Topic_sentence

    The topic sentence acts as a kind of summary, and offers the reader an insightful view of the paragraph's main ideas. [3] More than being a mere summary of a paragraph, however, a topic sentence often provides a claim or an insight directly or indirectly related to the thesis. It adds cohesion to an academic text and helps organize ideas not ...

  3. List of unsolved problems in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    This is a list of unsolved problems in chemistry. Problems in chemistry are considered unsolved when an expert in the field considers it unsolved or when several experts in the field disagree about a solution to a problem.

  4. Past paper - Wikipedia

    en.wikipedia.org/wiki/Past_paper

    A past paper is an examination paper from a previous year or previous years, usually used either for exam practice or for tests such as University of Oxford, [1] [2] University of Cambridge [3] College Collections. Exam candidates find past papers valuable in test preparation.

  5. Wikipedia:Writing better articles - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Writing_better...

    When the topic changes, a new paragraph should be started. Overly long paragraphs should be split up, as long as the cousin paragraphs keep the idea in focus. One-sentence paragraphs can be emphatic, and should be used sparingly. Some paragraphs are really tables or lists in disguise. They should be rewritten as prose or converted to their ...

  6. Portal:Chemistry/Major topics - Wikipedia

    en.wikipedia.org/wiki/Portal:Chemistry/Major_topics

    Analytical chemistry • Biochemistry • Chemical biology • Chemistry education • Computational chemistry • Electrochemistry • Environmental chemistry • Green chemistry • Inorganic chemistry • Materials science • Medicinal chemistry • Nuclear chemistry • Organic chemistry • Organometallic chemistry • Pharmacy ...

  7. Paragraph - Wikipedia

    en.wikipedia.org/wiki/Paragraph

    A paragraph (from Ancient Greek παράγραφος (parágraphos) 'to write beside') is a self-contained unit of discourse in writing dealing with a particular point or idea. Though not required by the orthographic conventions of any language with a writing system , paragraphs are a conventional means of organizing extended segments of prose .

  8. Chemistry - Wikipedia

    en.wikipedia.org/wiki/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.

  9. Wikipedia : Manual of Style/Lead section

    en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/...

    The lead should stand on its own as a concise overview of the article's topic. It should identify the topic, establish context, explain why the topic is notable, and summarize the most important points, including any prominent controversies. [B] The notability of the article's subject is usually established in the first few sentences.