Resistance offered by the molecules of a liquid to flow is termed as viscosity.
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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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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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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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The most expensive metal in the world
Do you think the most expensive metal is gold? No! On earth there are more valuable metals. But we need to divide the value of metals that occur in nature, and metals - isotopes, which are obtained in special laboratories. Let’s look at natural metals first.
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Ozone
We breathe 24 hours a day, 7 days a week, consuming about 25 kg of air every day. It turns out that we practically predetermine our health by the air we breathe.
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Associated Ions
Short-lived species formed by the collision of dissolved ions of opposite charges.
Periodicity
Regular periodic variations of properties of elements with atomic number (and position in the periodic table).
Anode
In a cathode ray tube, the positive electrode. Electrode at which oxidation occurs.
Heat of Condensation
The amount of heat that must be removed from one gram of a vapor at it's condensation point to condense the vapour with no change in temperature.
Electron Configuration
Specific distribution of electrons in atomic orbitals of atoms or ions.
Compound
A substance of two or more elements in fixed proportions. Compounds can be decomposed into their constituent elements.
Condensed States
The solid and liquid states.
Formula Weight
The mass of one formula unit of a substance in atomic mass units.
Covalent Compounds
Compounds containing predominantly covalent bonds.
Hydrogen Bond
A fairly strong dipole-dipole interaction (but still considerably weaker than the covalent or ionic bonds) between molecules containing hydrogen directly bonded to a small, highly electronegative atom, such as N, O, or F.
