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The number of repeating corresponding points on a wave that pass a given observation point per unit time.

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    Most of the microscopes used today are compound. A compound microscope features two or more lenses. A hollow cylinder called the tube connects the two lenses. The top lens, the one people look through, is called the eyepiece. The bottom lens is known as the objective lens. Below the two lenses is...

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    Metals have been used by people since ancient times. All the time the process of obtaining them was improved, useful alloys of various metals appeared. Let’s look at interesting facts about metals.

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    One of the most interesting and obvious chemical experiments is the experiment on the interaction of copper sulfate and calcium carbonate. The latter is contained in the shell of a simple egg, but copper sulphate should be searched in a chemical reagent store. This experience is simple, but...

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Radiation

High energy particles or rays emitted during the nuclear decay processes.

Polyprotic Acid

An Acid that can form two or more hydronium ions per molecule, often a least one step of ionization is weak.

Alkynes

Unsaturated hydrocarbons that contain one or more carbon-carbon triple bonds.

Basic Salt

A salt containing an ionizable OH group.

Endothermic

Describes processes that absorb heat energy.

Crystal Field Theory

Theory of bonding in transition metal complexes in which ligands and metal ions are treated as point charges, a purely ionic model, ligand point charges represent the crystal (electrical) field perturbing the metal?s d orbitals containing nonbonding electrons.

Hydrogen-Oxygen Fuel Cell

Fuel cell in which hydrogen is the fuel (reducing agent) and oxygen is the oxidizing agent.

 

Mass Spectrometer

An instrument that measures the charge-to-mass ratio of charged particles.

Molar Solubility

Number of moles of a solute that dissolve to produce a litre of saturated solution.

Cis-Trans Isomerism

A type of geometrical isomerism related to the angles between like ligands.