Quantum Number: Indices that label quantized energy states. Quantum numbers are used to describe the state of a confined electron, e. G. An electron in an atom.

 

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Quantum Number: Indices that label quantized energy states. Quantum numbers are used to describe the state of a confined electron, e. G. An electron in an atom.

Principal Quantum Number: The quantum number that determines the size and (in hydrogen atoms) the energy of an orbital. N is used to label electron shells. N may take on integer values from 1 to infinity.

Magnetic Quantum Number: Quantum number that labels different orbitals within a subshell. Mell can take on values from -ell to +ell. The number of orbitals in a subshell is the same as the number of possible mell values.

Angular Momentum Quantum Number: (ell) azimuthal quantum number; orbital angular momentum quantum number. A quantum number that labels the subshells of an atom. Sometimes called the orbital angular momentum quantum number, . . . View Full Definition

Oxidation Number: A convention for representing a charge of an atom embedded within a compound, if the compound were purely ionic. For example, H2O is a covalent compound; if it were ionic, the hydrogens woul . . . View Full Definition

Personal Identification Number (PIN): A code used by a mobile telephone number in conjunction with an SIM card to complete a call.

Abbe Number: Denotes the degree of refraction of light of different wavelengths to different extents, given by a transparent material, such as glass. The lower the abbe number, the greater the dispersion . . . View Full Definition

Ol Number One: A fastball. The term comes from the usual signal that a catcher gives to a pitcher for a fastball, which is pointing the number one down.

Number Portability: A term used to describe the capability of individuals, businesses and organizations to retain their existing telephone number(s) –– and the same quality of service –– when switching to a new . . . View Full Definition

Number Of Days Sales Invested In Working Capital: An alternative measure of the amount of working capital used in generating the sales of a period: computed by dividing 365 days by the working capital turnover.