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Pauli Exclusion Principle

No two electrons in the same atom may have identical sets of four quantum numbers.

Hydrocarbons

Compounds that contain only carbon and hydrogen.

Formula Weight

The mass of one formula unit of a substance in atomic mass units.

 

Hund's Rule

All orbitals of a given sublevel must be occupied by single electrons before pairing begins.

Cyclotron

A device for accelerating charged particles along a spiral path.

Sigma Bonds

Bonds resulting from the head-on overlap of atomic orbitals, in which the region of electron sharing is along and (cylindrically) symmetrical to the imaginary line connecting the bonded atoms.

Standard Molar Enthalphy of Formation

The amount of heat absorbed in the formation of one mole of a substance in a specified state from its elements in their standard states.

Boiling Point Elevation

The increase in the boiling point of a solvent caused by the dissolution of a nonvolatile solute.

Saccharide

An organic compound containing a sugar or sugars.

First Law of Thermodynamics

The total amount of energy in the universe is constant (also known as the Law of Conservation of Energy) energy is neither created nor destroyed in ordinary chemical reactions and physical changes.