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Edexcel (also known since 2013 as Pearson Edexcel) [2] is a British multinational education and examination body formed in 1996 and wholly owned by Pearson plc since 2005. It is the only privately owned examination board in the United Kingdom. [3] Its name is a portmanteau term combining the words education and excellence.
Triple Award Science, commonly referred to as Triple Science, results in three separate GCSEs in Biology, Chemistry and Physics and provide the broadest coverage of the main three science subjects. The qualifications are offered by the five main awarding bodies in England; AQA , Edexcel , OCR , CIE and Eduqas .
A superscript attached to the ∞ symbol for a property of a solution denotes the property in the limit of infinite dilution." [1] One important parameter of a solution is the concentration, which is a measure of the amount of solute in a given amount of solution or solvent. The term "aqueous solution" is used when one of the solvents is water. [2]
The most recent edition is the third edition (ISBN 978-0-85404-433-7), originally published by IUPAC in 2007. A second printing of the third edition was released in 2008; this printing made several minor revisions to the 2007 text. A third printing of the third edition was released in 2011.
In 2011, it was reported that a major problem that has befallen science education in Australia over the last decade is a falling interest in science. Fewer year 10 students are choosing to study science for year 11, which is problematic as these are the years where students form attitudes to pursue science careers. [43]
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 only stable chalcogenides under normal conditions are aluminium sulfide (Al 2 S 3), selenide (Al 2 Se 3), and telluride (Al 2 Te 3). All three are prepared by direct reaction of their elements at about 1,000 °C (1,800 °F) and quickly hydrolyze completely in water to yield aluminium hydroxide and the respective hydrogen chalcogenide .
Within the first year, the FDA's Drug Division, the predecessor to CDER, received over 1200 applications. The Drug Amendments of 1962 required manufacturers to prove to the FDA that the drug in question was both safe and effective. In 1966, the division was reorganized to create the Office of New Drugs, which was responsible for reviewing new ...