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Covalent bond resulting from the sharing of two electrons (one pair) between two atoms.

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Nucleons

Particles comprising the nucleus, protons and neutrons.

Nuclide Symbol

Symbol for an atom A/Z E, in which E is the symbol of an element, Z is its atomic number, and A is its mass number.

Nuclear Reaction

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

Molecular Orbital Theory

A theory of chemical bonding based upon the postulated existence of molecular orbitals.

Solubility Product Constant

Equilibrium constant that applies to the dissolution of a slightly soluble compound.

Ostwald Process

A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.

Crystal Field Theory

Theory of bonding in transition metal complexes in which ligands and metal ions are treated as point charges, a purely ionic model, ligand point charges represent the crystal (electrical) field perturbing the metal?s d orbitals containing nonbonding electrons.

Transition State Theory

Theory of reaction rates that states that reactants pass through high-energy transition states before forming products.

Standard Entropy

The absolute entropy of a substance in its standard state at 298 K.

Emission Spectrum

Spectrum associated with emission of electromagnetic radiation by atoms (or other species) resulting from electronic transitions from higher to lower energy states.