Covalent bond resulting from the sharing of two electrons (one pair) between two atoms.
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Use of diamonds
Diamond is a crystalline modification of pure carbon formed in the deep interior of the Earth, in the upper mantle at depths of more than 80-100 kilometers, at exceptionally high pressure and temperature. It is the most precious stone, the hardest and most wear-resistant mineral, the most...
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Creating Malachite egg
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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Diamonds Are Forever
Diamonds are still a girl's best friend, right? We love the shiny gems. They are the most popular rocks sold today. But what exactly are they, anyway? Where do they come from? What else are they used for?
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Chemistry of the sky
Chemistry can teach us about the composition of celestial bodies and determine their age.
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What are Compound Microscopes?
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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Specific Gravity
The ratio of the density of a substance to the density of water.
xenon trioxide
A colorless, nonvolatile solid, XeO3, explosive when dry: in solution it is called xenic acid.
Linkage Isomers
Isomers in which a particular ligand bonds to a metal ion through different donor atoms.
Anion
A negative ion, an atom or goup of atoms that has gained one or more electrons.
Basic Anhydride
The oxide of a metal that reacts with water to form a base.
Octet Rule
Many representative elements attain at least a share of eight electrons in their valence shells when they form molecular or ionic compounds, there are some limitations.
Vapor Pressure
The particle pressure of a vapor at the surface of its parent liquid.
Extrapolate
To estimate the value of a result outside the range of a series of known values. Technique used in standard additions calibration procedure.
Mass
A measure of the amount of matter in an object. Mass is usually measured in grams or kilograms.
Weak Electrolyte
A substance that conducts electricity poorly in a dilute aqueous solution.
