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A substance that cannot be decomposed into simpler substances by chemical means.

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Isoelectric

Having the same electronic configurations.

Melting Point

The temperature at which liquid and solid coexist in equilibrium, also the freezing point.

Ternary Compound

A compound consisting of three elements, may be ionic or covalent.

Photoelectric Effect

Emission of an electron from the surface of a metal caused by impinging electromagnetic radiation of certain minimum energy, current increases with increasing intensity of radiation.

 

Dermal toxicity

Adverse health effects resulting from skin exposure ot a substance.

Bonding Pair

Pair of electrons involved in a covalent bond.

Nitric Acid

HNO3: A strong acid, it is toxic and can cause severe burns. Transparent colorless or yellowish, fuming, suffocating, caustic and corrosive liquid. Nitric acid boiling point is 83C. A 70 percent solution is used in the S.S.E. laboratory for junction depth measurements. Nitric acid is also present in the metal etch solution used for the Aluminum etch procedure.

Effective Nuclear Charge

The nuclear charge experienced by the outermost electrons of an atom, the actual nuclear charge minus the effects of shielding due to inner-shell electrons.
Example: Set of dx2-y2 and dz2 orbitals, those d orbitals within a set with lobes directed along the x-, y-, and z-axes.

Homogeneous Mixture

A mixture which has uniform composition and properties throughout.

Thermodynamics

The study of the energy transfers accompanying physical and chemical processes.