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Isomers that differ only in the way that atoms are oriented in space, consist of geometrical and optical isomers.

 

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Molecular Equation

Equation for a chemical reaction in which all formulas are written as if all substances existed as molecules, only complete formulas are used.

Amino Acid

Compound containing both an amino and a carboxylic acid group.The --NH2 group.

Shielding Effect

Electrons in filled sets of s , p orbitals between the nucleus and outer shell electrons shield the outer shell electrons somewhat from the effect of protons in the nucleus, also called screening effect.

Adsorption

Adhesion of a species onto the surfaces of particles.

Chemical Change

A change in which one or more new substances are formed.

Actual Yield

Amount of a specified pure product actually obtained from a given reaction. Compare with Theoretical Yield.

Strong Electrolyte

A substance that conducts electricity well in a dilute aqueous solution.

 

Heat

A form of energy that flows between two samples of matter because of their differences in temperature.

Secondary Standard

A solution that has been titrated against a primary standard. A standard solution is a secondary standard.

 

How to keep flowers in a vase for long time

The best gift for a woman, as you know, is a beautiful bouquet of flowers. But the cut flowers at home quite quickly wither. But your favorite roses or tulips can keep their freshness if you use our advice. Chemistry and various chemical elements will help us in this difficult matter!