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A binary compound of hydrogen.

 

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Donor Atom

A ligand atom whose electrons are shared with a Lewis acid.

pH

Negative logarithm of the concentration (mol/L) of the H3O+[H+] ion, scale is commonly used over a range 0 to 14.

Ionization Energy

The minimum amount of energy required to remove the most loosely held electron of an isolated gaseous atom or ion.

Free Radical

A highly reactive chemical species carrying no charge and having a single unpaired electron in an orbital.

Nuclear Reaction

Involves a change in the composition of a nucleus and can evolve or absorb an extraordinarily large amount of energy.

Molality

Concentration expressed as number of moles of solute per kilogram of solvent.

Alkaline Earth Metals

Group IIA metals

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General Chemistry Online - Rich resource for students and teachers of introductory chemistry. Includes interactive course guides and tutorials, an exam survival guide, reference tables, self-grading quizzes and exams, a searchable glossary, a question and answer board, answers to over 300 frequently asked questions, and a chemical trivia quiz.
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EDF Chemical Scoreboard - Toxic Release Inventory data for the US. Sources and amounts of toxic chemicals released to air and water. Also has information on health effects and other topics.
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Central Atom

An atom in a molecule or polyatomic ion that is bonded to more than one other atom.

Mother Nuclide

Nuclide that undergoes nuclear decay.