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Refers to the occurrence of an element in an uncombined or free state in nature.

 

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Extensive Property

A property that depends upon the amount of material in a sample.

Atomic Number


Integral number of protons in the nucleus, defines the identity of element.
 

Noble Gases (Rare Gases)

Elements of the periodic Group 0, also called rare gases, formerly called inert gases, He,Ne,Ar, Kr, Xe, Rn.

Freezing Point Depression

The decrease in the freezing point of a solvent caused by the presence of a solute.ing Point

Complex Ions

Ions resulting from the formation of coordinate covalent bonds between simple ions and other ions or molecules.

Hard Water

Water containing Fe3+, Ca2+, and Mg2+ ions, which forms precipates with soap.

Joule

A unit of energy in the SI system. One joule is 1 kg. m2/s2 which is also 0.2390 calorie.

Manometer

A two-armed barometer.

Density

Density is the ratio b/w Mass and Volume: D=M/V

Dilution

Process of reducing the concentration of a solute in solution, usually simply by mixing with more solvent.