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energy level - An energy level is a possible value of energy that an electron can have in an atom. enthalpy - Enthalpy is the amount of energy in a system. entropy - Entropy is the disorder or randomness in a system. enzyme - An enzyme is a protein that acts as a catalyst in a biochemical reaction.
Jul 3, 2017 · where X is the parent atom, Y is the daughter atom, Z is the atomic mass of X, A is the atomic number of X. Example: 238 U 92 decays by alpha decay into 234 Th 90. alpha hydrogen – An alpha hydrogen is a hydrogen atom bonded to the α-carbon in a molecule. α-hydrogen is the most common notation for alpha hydrogen.
May 2, 2024 · Algebra: The branch of mathematics that substitutes letters for numbers to solve for unknown values. Algorithm: A procedure or set of steps used to solve a mathematical computation. Angle: Two rays sharing the same endpoint (called the angle vertex). Angle Bisector: The line dividing an angle into two equal angles.
- Anne Marie Helmenstine, Ph.D.
Welcome to the new interactive version of IUPAC Compendium of Chemical Terminology, informally known as the "Gold Book". On these pages you will find a new browsable, version of this publication. Start by: using the search in the navigation bar (top). To learn more about this new interactive version see the about page (Updated July 1st, 2019).
Definitions - AS I - CAIE Chemistry A-Level. These are the full set of keywords and definitions for CAIE A-Level Chemistry. These glossaries will help students learn all the key phrases needed for their exams. Definitions in bold are for higher tier only. Definitions marked by * are for separate sciences only.
May 29, 2024 · For each term, a brief definition is given, and each link leads to a more comprehensive discussion of the word. From absolute alcohol, which refers to the common name for high-purity ethanol, to zinc and zwitterion, an amino acid formed when a hydrogen ion transfers from an acid group to an amine group, you're sure to learn more with these hundreds of important chemistry terms.
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This glossary of chemistry terms is a list of terms and definitions relevant to chemistry, including chemical laws, diagrams and formulae, laboratory tools, glassware, and equipment. Chemistry is a physical science concerned with the composition, structure, and properties of matter , as well as the changes it undergoes during chemical reactions ; it features an extensive vocabulary and a ...
